Kyanite is a blue aluminosilicate mineral, typically found in aluminium rich metamorphic or sedimentary rocks. It is commonly found in quartz. Kyanite is also known as Disthene, Rhaticite, and Cyanite. Unique to Kyanite, is anisotropism; a characteristic in which the hardness of the mineral varies, depending on its crystallographic direction. Kyanite forms in blue blades within quartz. Kyanite gets its name from the color cyan, which comes from the Ancient greek, for dark blue.