Tiger's Eye is a popular chatoyant gemstone, a metamorphic rock from the quartz family, known for its golden to reddish-brown hues and silky, lustrous appearance caused by parallel intergrowths of quartz and altered amphibole fibers. Historically valued for protection, luck, and strength, it's used in jewellery and décor, displaying a captivating "cat's eye" effect (chatoyancy) when polished as cabochons or slabs.