Black Kyanite is a silicate mineral commonly found in aluminum-rich metamorphic & sedimentary rocks.
Black Kyanite is used in refractory and ceramic products. It is also used in electronics like abrasives & electrical insulators.
Black Kyanite’s crystalline structure is very interesting as it grows in fascinating and obscure shapes. The most relevant characteristic in identifying kyanite is its anisotropism; meaning its hardness varies depending on its crystallographic direction.
It has a dual Mohs hardness depending on the angle the pressure comes from. In fact, it is the most commonly known anisotropic mineral! Its vertical hardness ranges from 4.5 to 5.5; its horizontal hardness ranges from 6 to 7.
Black Kyanite is also known as “Witches Broom” due to the way it forms fan-like blades resembling a broom.
Due to that shape, it is believed to have the power to sweep debris and negative energy from one's spiritual life.
