5.31ct 2pcs recrystallized retailer blue sapphire (czochralski) octagon 8x6.5 lab grown

retailer Created Sapphire
Lot CS916

Color: Blue
Shape: Octagon
Size: 8x6.5mm
Weight: 5.31ct

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