Bixbiet (Rode Smaragd) Weight: 0.01 CT. Size: 1.5 mm Shape: Round Diamond Cut Color: Rich Hot Red Clarity: Eye Clean Luster: Dazzling Origin: Madagascar Hardness: 7.5 - 8 Specific Gravity: 2.67 - 2.84 Refractive Index: 1.56 - 1.59 Chemical Composition: Be3Al2(SiO3)6, Beryllium Aluminum Silicate Crystal Structure: Hexagonal J06277