If you are a seeker of beautiful colored crystals and mineral stones, here you can find one more to your gemstone collection - kyanite. Kyanite crystals are typically long, narrow blades as you can see. It is a hard mineral to cut as it has two distinctly different hardnesses. High-quality and nicely colored kyanite can be cut into attractive cabochons and faceted stones used in rings, earrings, pendants, and other jewelry, even beads. Crystal cursor with blue Kyanite.