Tijgeroog 11.6x14.6x7.2 mm Oval 10.65 CT. Color: Gold Brown Shape: Oval Cabochon Weight: 10.65 CT. Size: 11.6x14.6x7.2 mm Clarity: Opaque Luster: Tiger's Eye Hardness: 7 Origin: India Specific Gravity: 2.65 - 2.91 Refractive Index: 1.544 - 1.553 Chemical Composition: SiO2 , Silicon Dioxide Crystal Structure: Trigonal Treatment: None