A market-wide average across qualities and sizes. Your stone's value depends on carat, color, clarity, cut, treatment, and origin.
Amethyst is a purple variety of quartz, known for its striking violet hues that can range from light lavender to deep purple. It is relatively hard, scoring 7 on the Mohs scale, and is commonly found in various cuts, including oval, round, and emerald.
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.
The GemstoneAI market index for amethyst is $19 per carat as of 2026-08-04. 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 analyzes a photo of your stone for identity, treatment indicators, and authenticity signals, then estimates market value. It is free to try.
Over the past 30 days the amethyst index moved +1.5%. Gem prices move on supply, demand, and metal markets; treat any single stone as a collectible first and an asset second.