A market-wide average across qualities and sizes. Your stone's value depends on carat, color, clarity, cut, treatment, and origin.
Quartz is a versatile mineral known for its wide range of colors, including clear, smoky, and rose varieties. With a hardness of 7 on the Mohs scale, it is durable and often cut into various shapes such as cabochons and faceted stones.
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 quartz is $9.88 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 quartz index moved -1.2%. Gem prices move on supply, demand, and metal markets; treat any single stone as a collectible first and an asset second.