A market-wide average across qualities and sizes. Your stone's value depends on carat, color, clarity, cut, treatment, and origin.
Iolite is known for its striking violet-blue color, which can exhibit pleochroism, showing different hues when viewed from different angles. It has a hardness of 7 to 7.5 on the Mohs scale, making it suitable for various types of jewelry, and is commonly cut into oval and cushion shapes to enhance its 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 iolite is $45 per carat as of 2026-08-17. 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 iolite index moved +4.9%. Gem prices move on supply, demand, and metal markets; treat any single stone as a collectible first and an asset second.