4" Rough Natural Sky Blue Kyanite And Quartz Crystal Mineral Specimen Brazil

Location: Brazil

Weight: 4.8 Ounces

Dimensions: 4 Inches Long, 1.4 Inches Wide, 1 Inch Thick 

The Item pictured is the one you will receive. 

Kyanite is one of the most attractive blue minerals in nature. It sometimes exhibits intense shades of blue or even multiple shades with color zoning in a single crystal. The color of Kyanite, combined with its well-formed and sometimes large crystals, makes this mineral appreciated by both novice and expert collectors alike.

Kyanite is strongly anisotropic, meaning it has a different hardness depending on the angle. In fact, it is the most well-known anisotropic mineral. The vertical hardness of Kyanite ranges from 4.5 to 5.5, and horizontal hardness from 6 to 7. Kyanite is named from the Greek term cyanos, which means deep blue, alluding to the typical color of this mineral.