Tanzaniet 4x2 mm Marquise (Clean) (Heldere Blauwe Zoisiet uit Tanzania) Gewicht: 0.09 CT. Size: 4x2 mm Shape: Marquise Cut Color: Fine Purple Blue Clarity: Clean Luster: Incredible Origin: Tanzania, Africa Hardness: 6 - 7 Specific Gravity: 3.2 - 3.4 Refractive Index: 1.69 - 1.70 Chemical Composition: Ca2Al3(SiO4)3(OH), Calcium Aluminum Silicate Hydroxide Crystal Structure: Orthorhombic
