.8" Unusual Green Kyanite Crystal - Tanzania

Kyanite is a silicate mineral with the chemical formula Al2SiO5. It is known to be one of the most attractive natural minerals in the world, frequently found with lustrous blue bladed crystals. The intensity of color varies by location of extraction. Kyanite regularly forms fibrous, radiating crystals, but can be flattened and tabular. Some crystals form with white striations, color bands, and even multi-colored crystals, though many are typically found with a deep blue streak running down the middle.