Few gems can rival the depth of color in this Madagascar sapphire. Earth’s Treasury. Used with permission.
Few gems have held our attention over millennia as well as sapphire. The pure blue colors and excellent durability of this gem-quality member of…
Next to diamond, corundum is the hardest mineral known and is very compact and dense, with no cleavage. As a result, corundum is one of the best of…
With over 900 vendors and numerous geologic rarities, the 2017 Denver Gem and Mineral Showcase had plenty to see. Read about some highlights in…
Appraising blue sapphires is a critical skill for any jeweler or gemologist. Learn the basics you’ll need to evaluate one of the most popular…
Mermaid sapphires are the rarest type of teal sapphires. Learn all about these blue-green gems that could soon become popular engagement ring…
Next to diamond, corundum is the hardest mineral known and is very compact and dense, with no cleavage. As a result, corundum is one of the best of…
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