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

Name of mineral : Opal
Mohs hardness : 5~ 6

Refractive index : 1.450
Specific gravity : 2.15

Weight: 5.02 ct
Size (mm) : L 15.5 x W 12.9 x D 4.50
Untreated
Gem Quality
US $5,500