citrine

Don’t underestimate the importance of clarity, one of the Four Cs of gemstone grading. For faceted gems, basic clarity grading involves evaluating…

Step 5: Advanced Gem Information Lesson 2 Back to syllabus Synthetic diamonds aren’t new. General Electric (GE) has been making them since…

Whether you’re a new or experienced gem cutter, brush up on safety procedures. Learn about lapidary health hazards and how to prevent chronic…

What do you know about birthstones? Take our short birthstone quiz and learn about the makeup, cutting, and value of these popular gemstones.

From bright, sunny colors to deep golden hues, yellow gemstones are warm and inviting. Learn how to assess the quality of yellow gems and find out…

How can new gem cutters succeed in the gemstone business? Learn how rough buying and custom cutting can give you a competitive edge.

Gemstone color measurements are hard to make with conventional color-order systems. Learn how recent colorimetry tech advances have improved…

To make money, novice faceters have to buy gem parcels as well as hand-picked quality rough. Learn how a combination of both approaches can lead…

We tend to take light for granted. It’s such a common thing we experience every day. Rarely do we think of the scientific definition of light…