The live GemstoneAI index for amethyst. For prices by quality and size, see the amethyst price guide.
A market-wide average across qualities and sizes. Your stone's value depends on carat, color, clarity, cut, treatment, and origin.
Amethyst is a striking purple variety of quartz, known for its vibrant hues that can range from light lavender to deep violet. With a hardness of 7 on the Mohs scale, it is durable and often found in various cuts, including oval, round, and emerald shapes.
Market averages will not price your stone. GemstoneAI identifies gems and jewelry from a photo, checks authenticity and treatment signals, and gives you a real market valuation in seconds. Free to try.
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The middle first-read value from GemstoneAI scans of each kind of amethyst jewelry. All jewelry values from real scans.
The GemstoneAI market index for amethyst is $21 per carat as of 2026-11-09. That is a market-wide average across qualities, not a quote for a specific stone. Individual value depends on carat, color, clarity, cut, treatment, and origin.
Visual tests alone are unreliable. GemstoneAI identifies the stone from a photo, shows what else it could be, and estimates market value. It is free to try.
Over the past 30 days the amethyst index moved -2.6%. Gem prices move on supply, demand, and metal markets; treat any single stone as a collectible first and an asset second.