Kyanite is an aluminum silicate mineral present in metamorphic rocks. Its vibrant blue selection is prized for its distinctive bladed crystal construction and variable shade depth, starting from pale sky blue to deep, saturated indigo. This coloration arises from hint quantities of iron and titanium inside the crystal lattice. Key traits embody good cleavage in two instructions and notable anisotropism, that means its hardness differs relying on the route of the scratch.
Traditionally, kyanite’s warmth resistance has led to its industrial software in high-temperature ceramics and refractories. The aesthetic attraction of the blue variant has additionally made it a well-liked gemstone, believed by some to reinforce communication and tranquility. Its anisotropic nature presents lapidary challenges, requiring cautious slicing and sharpening to maximise brilliance and sturdiness.