Kyanite crystals form as long, bladed minerals most often in blue, prized for their striking striated columns. Notably, kyanite has two different hardnesses depending on direction (4.5 to 7 Mohs), a property that sets it apart from most stones. The mineral carries a long association with clear communication and calm focus. Browse our kyanite crystals — blades, beads, and rough pieces — for that deep blue.