Kyanite is an aluminum silicate mineral present in metamorphic rocks. Its vibrant blue selection is prized for its distinctive bladed crystal construction and variable coloration 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 embrace excellent cleavage in two instructions and notable anisotropism, which means its hardness differs relying on the path of the scratch.
Traditionally, kyanite’s warmth resistance has led to its industrial utility in high-temperature ceramics and refractories. The aesthetic enchantment of the blue variant has additionally made it a preferred gemstone, believed by some to boost communication and tranquility. Its anisotropic nature presents lapidary challenges, requiring cautious reducing and sharpening to maximise brilliance and sturdiness.