A market-wide average across qualities and sizes. Your stone's value depends on carat, color, clarity, cut, treatment, and origin.
Kyanite is an aluminum silicate mineral known for its strong anisotropy in hardness and its typical blue to blue-green coloration. It forms bladed crystals and often shows color zoning and pleochroism. Hardness is direction-dependent: about 4.5–5 parallel to the length of the crystal and 6.5–7 across it. It has perfect cleavage in one direction, which makes cutting challenging and affects durability in 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 kyanite is $59 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 kyanite index moved -2.2%. Gem prices move on supply, demand, and metal markets; treat any single stone as a collectible first and an asset second.