A market-wide average across qualities and sizes. Your stone's value depends on carat, color, clarity, cut, treatment, and origin.
Tanzanite is renowned for its striking blue-violet hue, a result of its unique trichroism, which displays different colors when viewed from different angles. With a hardness of 6 to 7 on the Mohs scale, it is relatively durable and often cut into various shapes to enhance its vibrant color.
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 tanzanite is $474 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 tanzanite index moved +5.4%. Gem prices move on supply, demand, and metal markets; treat any single stone as a collectible first and an asset second.