Dravite and Harlequin Opal Physical Properties

Dravite and Harlequin Opal Chemical Formula

While comparing Dravite and Harlequin Opal physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Dravite and Harlequin Opal chemical formula.

• Chemical formula of Dravite- Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
• Chemical formula of Harlequin Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

Dravite and Harlequin Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dravite and Harlequin Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Harlequin Opal Optical Properties during the identification of gemstone. Specific gravity of Dravite is 1.98-2.50 whereas that of Harlequin Opal is 1.98-2.50.