Tag Archive for TURQUOISE

December Birthstone – Turquoise

turquoise

previous month zodiac signs next month Turquoise fact file Crystal Structure: minute triclinic crystals Chemical Composition: hydrous phosphate of aluminum and copper CuO.3Al2O3.2P2O5.9H2O Hardness: 5-6 MOHS Refractive Index: 1.61 to 1.65 Colors: Opaque, dark to light blue, different ranges of…