Zeer mooie Aquamarijn ± 0.50 CT. 6x4 mm Ovaal Gefaceteerd. Color: Bright Blue Clarity: Clean Luster: Mindblowing Origin: Africa Hardness: 7.5 - 8 Specific Gravity: 2.67 - 2.84 Refractive Index: 1.57 - 1.60 Chemical Composition: Be3Al2(SiO3)6, Beryllium Aluminum Silicate Crystal Structure: Hexagonal