Shape: Round Size: 8 mm Weight: about 2.2 cts each
Size: 7 mm Weight: about 1.5 cts each
Size: 6 mm Weight: about 0.9 cts each
Refractive index: 1.65-1.7 Hardness: 7 (Mohs scale) Dispersion (effects of light): 0.015 Wax casting: Yes Melting Point: 1700 °C
Notice: The color of the photo may be different from the actual due to different computer monitors and other devices. This stone has very dark grey color, similar to grey spinel, without inclusions.
