15 reactions · 6 comments | Kyanite is strongly anisotropic! Meaning that it has a different hardness depending on the angle, which is roughly between 4 to 7. This mineral is usually found in long, slender bladed crystals. It is typically blue but can be found in Black, Green, and Orange as well. The key locations are usually in - Italy  -Austria  -United States  | Geology Rocks | Facebook

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