Addison Rice
Staff WriterA geologist, environmental engineer and Caltech graduate, Addison’s interest in the mesmerizing and beautiful results of earth’s geological processes began in her elementary school’s environmental club. When she isn’t writing about gems and minerals, Addison spends winters studying ancient climates in Iceland and summers hiking the Colorado Rockies.
Articles by Addison Rice
Jade Buying Guide
Learn everything about jade buying with our comprehensive guide. Discover quality factors, treatments, and pricing for jadeite vs nephrite jade...
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Ruby and Sapphire Grading Tools
What ruby and sapphire grading tools does a novice gemologist need? Learn how basic gemological equipment can help you identify...
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Identifying Jade Treatments
Jade is one of the most popular and expensive gemstones. It can also receive many enhancements. Learn about jade treatments...
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Color Filters: Uses and Limitations for Gemology
A set of color filters can be helpful in the field and in the lab. Learn the limitations and uses...
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Hybrid Gemstones: Glass Rubies and More
Some gems contain both natural and lab-made components. Learn about these hybrid gemstones and how to distinguish them from mined...
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Why We Love Montana Sapphires and Yogo Sapphires
With rich cornflower blue Yogo sapphires and fancy-colored gems in any color of the rainbow, Montana sapphires are a great...
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32 Green Gemstones: From Everyday Durability to Collector’s Rarities
A favorite color for nature-inspired designs, green gemstones never go out of style. Learn which of these 32 green gems...
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Appraising Rubies
Appraising rubies is a skill every jeweler and gemologist needs to master. Learn about the different quality factors that can...
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Pearl Treatments and Enhancements
Did you know that routine pearl treatments are the most common enhancements in the gem trade? Learn more about these...
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Lapis Lazuli Buying Guide
Our lapis lazuli buying guide can help you learn how to grade these gems, what to avoid, and how to...
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Natural Pearls vs Cultured Pearls
Many consumers don’t understand the difference between natural pearls and cultured pearls. Learn what these terms mean and how to...
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Appraising Pearls: How to Grade Pearls
Novice gemologists and jewelers may find appraising pearls difficult. Our guide will show you how to appraise and grade different...
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Pearl Simulants: How to Spot Faux Pearls
Some faux pearls can be difficult to identify. Learn about the history and varieties of pearl simulants and how to...
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Morganite Buying Guide
Complete morganite buying guide covering the 4 Cs, treatments, and pricing. Learn how to choose the perfect pink beryl gemstone...
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Seven Famous Emeralds and Their Stories
Some famous emeralds have amazing histories. These seven gems have gone through revolutions, shipwrecks, and thefts to become crown jewels...
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Emerald Origins: History and Identification
Emeralds from different sources can vary in quality. Learn how to identify emerald origins by analyzing the optical and physical...
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Emerald Buying Guide
Master emerald buying with our comprehensive guide. Learn to evaluate color, clarity, cut, and carat while avoiding treated stones and...
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Kunzite Buying Guide
Rare and fragile, kunzite challenges lapidaries and delights jewelry aficionados. Our kunzite buying guide can help you add this gem...
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Tridacna Pearl Buying Guide
Clam pearls can grow to be some of the largest in the world. Learn more about these aquatic gems and...
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Ammolite Buying Guide
With bright rainbow iridescence, ammolite is sure to draw attention. Read about this gem’s unique quality factors before your next...
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Citrine Buying Guide
Master citrine buying with our comprehensive guide. Learn quality factors, treatments, and pricing for this stunning yellow-orange gemstone perfect for...
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Malaya Garnet Buying Guide
Rare malaya garnets come in many colors and make wonderful jewelry stones for any style. Learn the 4 Cs of...
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Agate Buying Guide
Decorative, patterned forms of agate are excellent natural gems. Learn more about agate's mesmerizing patterns in our agate buying guide....
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Zircon Buying Guide
Learn everything about zircon buying with our comprehensive guide. Discover quality factors, colors, treatments, and jewelry considerations for this brilliant...
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Turquoise Buying Guide
Revered for millennia, turquoise still has a dedicated following. Our turquoise buying guide can help you pick a gem for...
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Red Gemstones: Ruby, Spinel, Garnet, and Other Great Picks for Jewelry
Red gemstones are popular choices for engagement rings and fine jewelry. The three most popular stones are ruby, garnet, and...
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10 Gemstones Rarer than Diamond: The Earth’s Scarcest Treasures
Are you looking for something truly unique for your next jewelry purchase? Explore these ten gemstones that are actually rarer...
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Toxic and Radioactive Gems: Safety Tips
If you're considering adding toxic and radioactive gems to your collection, be on the safe side. Learn the basics of...
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Lapidary Health Hazards and Safety Tips
Whether you’re a new or experienced gem cutter, brush up on safety procedures. Learn about lapidary health hazards and how...
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Blue Gemstones: 37 Varieties, Properties & Care Guide
Explore 37 blue gemstones from rare collectors' specimens to durable jewelry options. Learn how to assess quality, understand durability factors,...
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Chrysoprase Buying Guide
With bright, apple-green hues, chrysoprase makes an eye-catching jewelry stone. Our chrysoprase buying guide will help you pick a top-quality...
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Marketing and Selling Rare Gemstones
You need a good strategy for marketing and selling rare gemstones to succeed in this niche market. Learn how to...
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Finding the Best Artificial Lighting for Gems: Buying, Selling, and Grading
Gemstones are creatures of light. Learn how lighting impacts gem sales and get recommendations for high-quality artificial lighting for gems....
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Quahog Pearl Buying Guide
Your next plate of steamed clams might hold a rare quahog pearl. Learn how to judge the quality of these...
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How to Start a Gem Collection
Although many gem enthusiasts want to become collectors, they may not know where to begin. Read this article for tips...
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19 Stunning Yellow Gemstones (With 9 Best Picks for Jewelry)
From bright, sunny colors to deep golden hues, yellow gemstones are warm and inviting. Learn how to assess the quality...
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Ethiopian Emeralds (Better than Colombian?)
Learn everything you need to know about Ethiopian emeralds, including quality, pricing, gemology, and how they compare to those from...
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Tanzanite Buying Guide
Master tanzanite buying with our expert guide covering the 4 Cs, treatments, simulants, and investment tips. Learn to identify quality...
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Pearl Buying Guide
In this golden age of pearls, a wide variety of shapes, sizes, and colors are available. Our pearl buying guide...
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Rutilated Quartz Buying Guide
Silky golden rutile inclusions in quartz have become quite popular. Read our rutilated quartz buying guide to help you choose...
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Unique Gem Materials for Jewelry Design
Some gems have an appeal beyond their appearance. If you’re looking for a gem with a story to tell, try...
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Gemstone Cufflinks Guide
Wearing gemstone cufflinks is a great way to add personality and style to a standard tuxedo. Learn how to choose...
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How to Spot a Fake Diamond: What These 13 Tests Really Mean!
Not sure what your gem is? Try these 13 at-home tests to spot a fake diamond — and learn what...
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Melo Pearl Buying Guide
Bright orange colors and flames that seem to dance across the surface make the melo pearl a fascinating gem choice....
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Crystalline Quartz Buying Guide
Although often overlooked, quartz is available in many styles at reasonable prices. Our crystalline quartz buying guide can help you...
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Demantoid Garnet Buying Guide
Stunning green hues and a brilliance that outshines diamond combine to make demantoids truly captivating. Read more in our demantoid...
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Moonstone Buying Guide
Discover expert moonstone buying tips, evaluation criteria, and pricing insights. Learn about colors, clarity, cuts, and settings for perfect moonstone...
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Garnet Buying Guide
With so many colors and varieties available, garnet buying can be daunting. Whether starting your collection or completing it, our...
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Precious Coral Buying Guide
Deep-water coral displays bright, rich reds and delicate pinks. Our precious coral buying guide will help you choose a gem...
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Aquamarine Buying Guide
Discover the complete aquamarine buying guide with expert tips on color, clarity, cut, and carat. Learn about treatments, synthetics, and...
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Alexandrite Buying Guide
Vivid color change makes alexandrite one of the world’s most coveted stones. Our alexandrite buying guide can help you find...
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Amethyst Buying Guide
Long valued for its purple color and symbolic associations, amethyst is a versatile gem. Our amethyst buying guide can help...
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Amber Buying Guide
Complete amber buying guide covering quality factors, treatments, and jewelry considerations. Learn to identify genuine amber and avoid imitations when...
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Diamond Certification FAQ
Don't be fooled by overgraded diamonds. Learn how diamond grading reports from different labs can impact the quality of the...
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Trapiche Gems: An Introduction
Satisfying the human desire for symmetry, trapiche gems have a special allure. Learn what makes these rarities so unique in...
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Ultimate Diamond Buying Guide
Buying a diamond doesn't have to be difficult. Learn everything you need to know to buy the best diamond for...
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Tourmaline Buying Guide
Known for stunning, saturated hues, tourmaline is a colorful and modern gemstone. Read about quality factors for this gem in...
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Watermelon Tourmaline Buying Guide
Looking for a fun summertime gem? Watermelon tourmaline adds a pop of color that's perfect for a playful summer look....
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Raw Stone Jewelry Design and Care
Raw stone jewelry is trending. Read this article for tips on incorporating raw stones into your jewelry designs and cleaning...
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Learn to Use a Refractometer (Video)
This refractometer tutorial video will show you how to find a gem's refractive index, birefringence, optic character, and other properties....
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Learn to Use a Polariscope (Video)
Taking polariscope readings can be challenging. In this tutorial video, you'll learn how to use this tool and which gems...
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Diamond Rarity, Quality, and Cost
Word is out that diamonds aren’t that rare. So, why are they still so expensive? Learn about diamond rarity and...
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Learn to Measure Specific Gravity (Video)
Determining a gem's specific gravity is an important identification technique. Watch this tutorial video to learn how to measure this...
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White Sapphires vs Diamonds
Do white sapphires make good alternatives to diamonds? Compare their qualities and learn how to choose the right engagement ring...
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Learn to Use a Diamond Tester and Chelsea Filter (Video)
Some very helpful gemology tools are easy to use. Learn about the Chelsea filter, diamond tester, and other simple instruments...
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Learn to Use a Dichroscope (Video)
Not sure if your gem is pleochroic? This tutorial video will teach you how to use the dichroscope to determine...
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Can an I1 Clarity Diamond be Eye-Clean?
Can you save money with an I1 clarity diamond and still have a nice-looking engagement ring? Learn how to look...
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Learn to Use the Spectroscope (Video)
Taking spectroscope readings can be challenging. This tutorial video will teach you different techniques you can use to view a...
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Learn to Use the Microscope (Video)
Some student gemologists might be unfamiliar with the microscope. This tutorial video will demonstrate how this instrument can help you...
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Before Buying a Diamond: 9 Tips You Should Know
You’ll have to make many decisions when you choose a diamond for your engagement ring. Here are nine things you...
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Is a VS1 Clarity Diamond a Good Buy?
Does a VS1 clarity diamond offer a good balance between quality and price? Learn how to compare clarity grades so...
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Old European Cut Diamonds: The Complete Guide
The old European cut (OEC) has a lovely charm. Learn what makes an OEC diamond special and how to find...
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Is an SI2 Clarity Diamond Eye-Clean?
Although an SI2 clarity diamond has a low clarity grade, you can still find one that will look good in...
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Best Diamond Color for Rose Gold Rings
What diamond color will look best in a rose gold engagement ring? In this guide, you’ll learn everything you need...
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Is a Super Ideal Cut Diamond Worth It?
Super ideal cut diamonds meet exacting standards for top visual performance. But are they worth the extra cost? Before you...
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Buying a Trillion-Cut Diamond
A trillion-cut diamond makes a distinctive center stone, but finding a good one can be difficult. Learn how to choose...
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What’s the Best Diamond Alternative?
If you like the diamond look but want something different, learn the pros and cons of these white gems and...
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SI1 Clarity Diamond: Is It The Right Choice For Your Ring?
Wondering if SI1 clarity diamonds are worth buying? Discover how to find eye-clean SI1 diamonds that look flawless, save money...
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Is an E Color Diamond Worth the Price?
Is an E color diamond a good choice for your engagement ring? Learn why the second-best white diamond color grade...
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Is a VS Clarity Diamond a Good Choice?
When is a VS clarity diamond the best option for your engagement ring? Learn about diamond clarity grades and how...
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Best Diamond Color for Yellow Gold Rings
Finding the best diamond color for your budget and style can be a challenge. Learn how to choose a diamond...
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Should I Buy a VS2 Clarity Diamond?
How will a VS2 clarity diamond look in an engagement ring? Learn if it’s the right stone for you and...
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Is an I Clarity Diamond a Good Buy?
An I clarity diamond has a low clarity grade, but can it look OK in an engagement ring? Learn the...
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Best Diamond Color for White Gold Rings
Finding the best diamond color for a white gold engagement ring can be tricky. Read our complete guide to finding...
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Is an SI Clarity Diamond a Good Deal?
Clarity grades are the most confusing part of diamond engagement ring buying. See what an SI clarity diamond looks like...
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Interview with Gemology Tools Expert Cara Williams
What’s working in a gem lab like? Gemology tools expert Cara Williams talks about the challenges as well as the...
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How Do Garnets Form?
A versatile gem and the famous January birthstone, garnet is a favorite among jewelers and consumers. Learn how garnets form...
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How Does Quartz Form?
Quartz is one of the most abundant minerals on earth. Learn how quartz forms and how its most popular varieties...
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Citrine Engagement Ring Guide
Sunny and bright, citrines symbolize health and happiness. Our citrine engagement ring guide will show you how to pick the...
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Gemstone Coatings: CVD and More
Gemstone coatings are a simple way to enhance color and luster. Learn about commonly coated gems, different coating techniques, and...
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Common Gemstone Treatments Cheat Sheet
There are so many common gemstone treatments available today that keeping track of them can be difficult. This list and...
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How Does Topaz Form?
Topaz requires specific and unusual conditions to form. Learn how topaz develops and how it gets its colors, from yellow...
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Advanced Gemology Equipment
Gemstone treatments and synthetics are becoming more sophisticated. Learn about the advanced gemology equipment that gem labs use to stay...
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Paraíba Tourmaline Buying Guide
Paraíba’s neon blue hues stunned the gem world in the 1980s. Read about the quality factors for this striking gem...
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Five Tips for Your First Gem Show
New to the gem trade or just a hobbyist? Don't be intimidated! Follow these tips for your first gem show...
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Tourmaline Engagement Rings: the Ultimate Guide
Thinking about a tourmaline engagement ring? Learn everything you need to know to buy your perfect gem, from hardness and...
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Lab-Grown Diamonds FAQ
Lab-grown diamonds are becoming popular options for engagement ring stones. Learn the truth about these gems in our FAQ and...
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How Do Tourmalines Form?
Learn about tourmaline formation, where tourmaline is found, and the unusual geological conditions that give this stone its fantastic colors....
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Identifying Lab-Made Emeralds
Mined emeralds are expensive, so lab-made emeralds are an attractive option for consumers. Learn how these synthetic gems are made...
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Appraising Emeralds
Appraising emeralds is a key skill for all jewelers and gemologists. Learn how to evaluate the quality of these rare...
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Pearl Buying Guide – Special Free Preview
In this golden age of pearls, a wide variety of shapes, sizes, and colors are available. Our pearl buying guide...
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Choosing an Emerald Engagement Ring Stone
If you like green, you’ll love an emerald engagement ring. However, judging emerald quality is complicated. Learn how to find...
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An Interview with Sapphire Expert Jeffery Bergman
In a recent interview, Jeffery Bergman talks about his decades-long career as a sapphire expert and connoisseur and offers his...
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How Do Emeralds Form?
How do emeralds form? Learn how the emerald growth process works and why it makes these gems rare, green, and...
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An Interview with Pearl Expert Jim Grahl
Curious about natural pearls? Hear what pearl expert Jim Grahl has to say about natural pearls and pearl jewelry design,...
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Choosing a Ruby Engagement Ring Stone
A traditional favorite, a ruby engagement ring stone symbolizes love and passion. Learn how to find the gem that best...
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An Interview with Ruby Expert Richard Hughes
Richard Hughes has been a leading ruby expert for decades. Learn how he got started and his tips for newcomers...
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Appraising Blue Sapphires
Appraising blue sapphires is a critical skill for any jeweler or gemologist. Learn the basics you’ll need to evaluate one...
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Eight Famous Rubies
Blood red ruby gems have captivated people's hearts and imaginations for centuries. Read about these eight famous rubies and what...
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Eight Famous Sapphires and the Stories Behind Them
Large, beautiful, and historically important, these eight famous sapphires have fascinating stories to tell. Learn what makes them so special....
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How Do Rubies and Sapphires Form?
The geological conditions in which rubies and sapphires form are rare and extreme. Learn how these popular gems develop and...
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Keshi Pearls and Soufflé Pearls
Not all pearls are perfectly round and white. Learn about keshi pearls and soufflé pearls, which can form as cultured...
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Tahitian Pearls: Beautiful Black Pearls
With dark bodies and colorful sheens, beautiful Tahitian pearls have mesmerized jewelry lovers for decades. Learn more about these and...
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Seven Famous Pearls and Their Histories
Cursed, perfect, or just huge, these famous pearls are fascinating. Read their history-rich tales filled with people like Kublai Khan...
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South Sea Pearls: the Complete Guide
With thick nacre and large sizes, South Sea pearls really stand out when compared to other pearl types. Learn more...
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Freshwater Cultured Pearls
As consumers compare price and quality, freshwater cultured pearls are rapidly becoming more popular than Akoyas. Learn more about these...
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Akoya Pearls: the Complete Guide
Since the beginning of the cultured pearl industry, Akoya pearls have ruled the market. Learn more about the quintessential round,...
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How Do Pearls Form?
Do pearls form around grains of sand trapped in oysters? Learn the facts about pearl formation and the various mollusks...
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An Interview with Opal Expert Joel Ragan
Opal expert Joel Ragan has worked with these gems for 45 years. Learn how he got started and his top...
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16 Famous Opals and Their Amazing Stories
These sixteen famous opals include some of the largest and most beautiful in the world. Learn their fascinating backstories in...
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Opal Treatments: How to Detect Treated Opals
With so many opal treatments on the market, it’s important to understand the different enhancement processes. Read on to learn...
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Identifying Opal Patterns
Opal connoisseurs all have their favorite opal patterns. Learn how to identify the patterns of these beautiful gems with plenty...
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Opal Simulants: How to Spot Imitation Opal
How can you be sure that a piece of opal for sale is genuine? Learn about the major types of...
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Synthetic Opal Types
Distinguishing synthetic opal from a mined gem is a vital skill for opal dealers. Learn about five different types of...
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Opal Prospecting and Mining
Headed out to the opal fields? Read on to learn more about opal prospecting and mining, plus some expert tips...
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Vintage Engagement Rings: Guide to Four Eras
Vintage engagement rings come in many different styles, but designs from four eras are very popular today. Learn more and...
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Three-Carat Diamond Guide: Prices & Tips
Three carats is a dream size for many diamond shoppers. Learn about current prices and how to find the best...
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Creating an Ethical Engagement Ring: the Complete Guide
If you're trying to create an ethical engagement ring, you have some research ahead. Our guide can help you shop...
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Eight Opal Types Explained
Opal is a complicated gemstone, and many factors affect its price. Learn how to distinguish these eight opal types and...
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Radiant-Cut Diamonds Buying Guide: Modern & Durable
Exceptionally sparkly, radiant-cut diamonds are great for engagement rings. But how can you find a top-quality gem? Read our tips...
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Diamond Girdles: 11 Facts You Need to Know
Buying a diamond but unsure about the girdle? Learn everything you need to know about diamond girdles, including thickness ratings...
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How Do Opals Form?
Curious about how opals form and show such stunning colors? Learn about the scientific theories behind opal formation and why...
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Finding the Perfect Carat Diamond: Complete Size Guide
Discover ideal diamond sizes for rings, earrings, and necklaces with our comprehensive guide exploring carat weights, visual impact, and price...
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Marquise-Cut Diamonds Buying Guide: Vintage & Modern
A beautiful and versatile shape, marquise-cut diamonds are perfect for unique engagement rings. Learn how to pick the stone that’s...
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Five-Carat Diamond Ring: an Insider’s Guide
Choosing a five-carat diamond isn't as simple as finding a diamond in a smaller size. Read our insider tips to...
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Engagement Ring Setting: What’s Your Style?
Choosing a setting is the most important decision when shopping for a ring. Read about your options in this comprehensive...
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Moissanite vs Diamond: Ultimate Comparison Guide for Engagement Rings
Comparing moissanite vs diamond engagement rings? Discover key differences in brilliance, durability, and price to make the perfect choice for...
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Cushion Cut Diamonds: A Complete Buying Guide
With elegant curves, cushion-cut diamonds have a classic, timeless style. Learn the pros and cons of cushions and how to...
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Diamond Polish and Symmetry Explained
If you're a first-time buyer, you may be worried about diamond polish and symmetry grades. But what do these grades...
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Pear Shape Diamond Guide: Unique & Stunning
Dreaming of a pear shaped diamond engagement ring? Learn the pros and cons and read our expert advice to find...
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Is a D Color Flawless Diamond Worth the Price?
A D color flawless diamond has the highest color and clarity grade — and the biggest price tag. Are these...
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Ruby and Sapphire Survey: Where Do You Draw the Line?
Our survey asked for your input on the age-old question: where is the line between ruby and sapphire? The results...
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6 Steps to Buying a One-Carat Diamond Ring
Buying a one-carat diamond ring shouldn't be confusing. Learn how to pick the ring that's best for you in our...
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Hearts and Arrows Diamond: Is it Worth it?
Although cut for perfect symmetry and top performance, is a Hearts and Arrows diamond worth the high price? Learn more...
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Different Diamond Shapes: Ultimate Guide with Size & Price Chart
Considering different diamond shapes for your engagement ring? Learn how shape affects size and cost and read their pros &...
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How Does Diamond Fluorescence Affect Price and Color?
Some advice you might find on diamond fluorescence is outdated. Learn how fluorescence really affects your diamond’s color grade and...
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Emerald Cut Diamonds vs Asscher Cut Diamonds: A Guide
The mesmerizing patterns of emerald & asscher-cut diamonds can give engagement rings a subtle style. Learn how to find a...
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Conflict-Free Diamonds: What Does it Mean?
Searching for an ethical engagement ring? Learn about conflict-free diamonds, issues with artisanal mining, and how to find a ring...
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Princess Cut Diamonds: The Ultimate Guide
Princess cut diamonds are an excellent alternative to rounds. Learn the 4Cs for princess cuts and how to choose the...
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Should I Buy a VVS Diamond? 6 Pros & Cons
Before spending money on a VVS diamond, read about the pros and cons of diamonds with this clarity grade. What...
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Oval Cut Diamond Buying Guide
Don’t let the bowtie effect keep you from buying an oval cut diamond. With prices lower than rounds, ovals are...
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Searching for Diamonds Online: 4 Essential Diamond Charts
Searching for diamonds online shouldn't be so complex. Use our recommended parameters to buy the best diamond for your engagement...
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Gemstone Toxicity Table
Gem faceters and jewelry enthusiasts alike should learn about gemstone toxicity. This table has toxicity ratings for 280+ gems, based...
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Padparadscha Sapphire Buying Guide
What qualities should you look for when padparadscha sapphire buying? Learn about the sunset colors and other properties of these...
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Gem Treatment Survey: Is this Gem Natural?
We've tallied your opinions from our gem treatment survey. Are treated gems natural? How much should they cost? With a...
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Conch Pearl Buying Guide
Considering a conch pearl buying trip to the Caribbean? Quality factors for these gems differ from colored gemstones. Before you...
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Fancy Colored Pink Diamond Buying Guide
With only a few produced each year, pink diamonds are among the rarest gems on the planet. Learn how quality...
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Iolite Buying Guide
Soft, violet-blue hues have made iolite a popular stone. Read about the quality factors for this trendy gem in our...
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Fancy Colored Blue Diamond Buying Guide
Blue diamonds are among the rarest and most prized diamonds. Our blue diamond buying guide will help consumers understand the...
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Fancy Colored Yellow Diamond Buying Guide
Fancy colored yellow diamonds are becoming increasingly popular. Our yellow diamond buying guide has the information you need before your...
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Denver Gem & Mineral Showcase 2017
With over 900 vendors and numerous geologic rarities, the 2017 Denver Gem and Mineral Showcase had plenty to see. Read...
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A Visitor’s Guide to Colorado Gemstones
Colorado has a lot to offer gemologists and rock hunters. Before you visit, learn about Colorado gemstones as well as...
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