Achroite and Harlequin Opal Physical Properties

Achroite and Harlequin Opal Chemical Formula

While comparing Achroite 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 Achroite and Harlequin Opal chemical formula.

• Chemical formula of Achroite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
• Chemical formula of Harlequin Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

Achroite and Harlequin Opal Specific Gravity

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