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

Name of mineral : Quartz
Mohs hardness : 7
Refractive index : 1.544~1.553
Specific gravity : 2.66

Untreated
Gem Quality
Size (mm) : L 15.1 x W 14.1 x D 10.53
Weight: 13.49 ct
US $1,900