Kyanite is very anisotropic, meaning it has a different hardness depending on the angle. Its vertical hardness ranges from 4.5 to 5.5, while the horizontal hardness is from 6 to 7 on the Mohs scale. This characteristic of the mineral led to it being commonly called “disthene”, meaning two strengths.

Kyanite is named from the Greek term cyanos, meaning deep blue.

Product color may slightly vary, due to its unique nature.

Approximately 4 x 4.5 x 14 inches

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