:: SUWA/Dictionary-Gemstones,Quality and Value::

Name of mineral : Corundum
Mohs hardness : 9
Refractive index : 1.762~1.770
Specific gravity : 4.00

Weight : 12.73 ct
Size (mm) : L 12.5 x W 10.3 x D 8.68
sri lanka, Possibly heated
Gem quality
US $120,000