Round brilliant-cut amethyst in a vivid reddish purple with violet-purple flashes around the crown, photographed face-up on a pale gray background at Sapphire Row
Amethyst
Sapphire Row

Purple Gemstones: A Gemologist's Guide to Choosing the Right Purple

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Gemstone knowledge from the source — sourcing insights, care guides, and buying advice to help you choose stones and jewelry with confidence.

Gemstone Journal

Round brilliant-cut violetish blue tanzanite photographed face-up at Sapphire Row, showing bright, evenly distributed light return across the crown facets — tanzanite is a species that is almost always heat treated Colored Gemstones
Sapphire Row

Gemstone Treatments Explained: What's Normal and What's Not

Almost every colored gemstone on the market has been treated in some way. Here is a gemologist's guide to which...

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