Blue Sapphire Lab Grown Rough(Czochralski)

Color: Blue Sapphire Mineral: Corundum Chemical Formula: Al2O3 Crystal System: Trigonal Hardness (Mohs): 9 Refractive Index: 1.76–1.77 Density, g/cm3: 4 Dispersion: 0.018 Pleochroism: Strong Growth Method: Czochralski MOQ:50 g Shipping :Custom within 15 days, stock within 3 days .