Sillimanite Cat’s Eye, also known as Fibrolite Cat’s Eye, is a rare and powerful gemstone recognized for its distinct “chatoyancy” — the shining band of light resembling a cat’s eye that moves across the surface. This gemstone is prized in Vedic astrology for its strong connection to Ketu (the South Node of the Moon) and is believed to bring protection, spiritual insight, and stability to the wearer. Its colors range from honey-yellow to brownish-green and gray, often with a silky sheen that enhances its allure.
Color: Yellowish-brown, greenish-gray, or golden with cat’s eye effect
Hardness: 6.5–7.5 on the Mohs scale
Sources: India, Sri Lanka, Myanmar, and Madagascar