Pleonaste and Achroite Physical Properties

Pleonaste and Achroite Chemical Formula

While comparing Pleonaste and Achroite 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 Pleonaste and Achroite chemical formula.

• Chemical formula of Pleonaste- (Mg,Fe)Al 2O 4Gemdat.org , Management Team (2012)
• 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.

Pleonaste and Achroite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pleonaste and Achroite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pleonaste and Achroite Optical Properties during the identification of gemstone. Specific gravity of Pleonaste is 2.90-3.40 whereas that of Achroite is 2.90-3.40.