Tiger's eye stone weighing 11.799 carats

Technical details: Type: Tiger's Eye Weight: 11.799 carats Dimensions (mm): 18.11x12.92x5.96 Shape: Oval cabochon Color: Black and brown Clarity: Unrated 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-grained quartz (Microcrystalline Quartz), known for its silky luster that resembles a cat's eye or tiger's eye, a visual phenomenon called "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 it. Tiger's Eye usually forms in metamorphic rocks.