mineral

Likely blue-green kyanite crystal

Kyanite, Al₂SiO₅

AI-generated identification · may be incorrect

Bladed, translucent pale blue-green crystal with vitreous-to-pearly luster and pronounced lengthwise striations; Mohs hardness varies by direction, about 4.5–5 parallel to the blade and 6.5–7 across it. The photo suggests a bladed mineral, but identification from appearance alone is uncertain.

Identified October 10, 2026More mineral →

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Physical properties

Formation & geological history

Kyanite forms during high-pressure regional metamorphism of aluminum-rich rocks; it occurs in metamorphic terrains of varied ages.

Uses & applications

Collected as a mineral specimen and occasionally cut for jewelry; industrial kyanite is used in refractory and ceramic products.

Geological facts

Kyanite’s strongly directional hardness is unusual and helps distinguish it from lookalike bladed minerals.

Field identification & locations

Look for flattened, striated blades, commonly blue, in schist or gneiss; verify with hardness testing or a mineral specialist, since the image alone cannot confirm the species.