A market-wide average across qualities and sizes. Your stone's value depends on carat, color, clarity, cut, treatment, and origin.
Tourmaline is a complex borosilicate mineral group with diverse compositions and a wide color range, including pink, red, green, blue, yellow, brown, black and bicolor or multicolor combinations. Varieties include rubellite (red), indicolite (blue), verdelite (green), Paraíba-type (neon blue-green) and watermelon (pink-and-green zoned), among others. With Mohs hardness 7–7.5 and generally good toughness, tourmaline is suitable for most jewelry.
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 tourmaline is $109 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 tourmaline index moved +14.8%. Gem prices move on supply, demand, and metal markets; treat any single stone as a collectible first and an asset second.