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

Trillion-cut vivid violetish blue gemstone held in stainless steel tweezers at Sapphire Row, its triangular outline spreading wide face-up for its carat weight Buying Guide
Sapphire Row

Carat Weight vs Size: Why Two One-Carat Gems Look Nothing Alike

Carat is a measure of weight, not size. Here is how density, cut depth and outline decide what a stone...

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