Tiger's eye stone weighing 17.08 carats

Technical details: Type: Tiger's Eye Weight: 17.080 carats Dimensions (mm): 20.06x15.15x7.14 Shape: oval cabochon Color: black and brown Clarity: ungraded Transparency: opaque Hardness: 7.0 Treatment: untreated Origin: unknown Certification: certificate from Saudi laboratory (MT) - website (www.mtgl.com.sa) Tiger's Eye is a type of fine-crystallized quartz (Microcrystalline Quartz), known for its silky shiny luster that resembles a tiger's eye or a cat's eye, a visual phenomenon called "chatoyancy" or "chatoyancy." This stone is composed of fine fibers of crocidolite (a mineral of asbestos) that have transformed into silica while maintaining their fibrous shape, creating luminous streaks of golden and brown color when reflected light hits them. Tiger's Eye typically forms in metamorphic rocks.