Tiger's eye stone weighing 11.743 carats

Technical details: Type: Tiger's Eye Weight: 11.743 carats Dimensions (mm): 17.98x13.35x6.43 Shape: oval cabochon Color: black and brown Clarity: unclassified 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-crystalline quartz (Microcrystalline Quartz), known for its shiny silky luster that resembles a tiger's eye or a cat, a visual phenomenon called "chatoyancy" or "chatoyancy." This stone is formed from 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.