Charoite and Polyhalite Physical Properties
Specific Gravity
2.54-2.78
2.78
Fracture
Conchoidal
Conchoidal
Cleavage
Good in three directions
Perfect on {10 1 }; parting on {010}
Chemical Composition
K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
K2Ca2Mg(SO4)4·2H2O
Charoite and Polyhalite Chemical Formula
While comparing Charoite and Polyhalite 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 Charoite and Polyhalite chemical formula.
- Chemical formula of Charoite- K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Polyhalite- K2Ca2Mg(SO4)4·2H2O
Charoite and Polyhalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Charoite and Polyhalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Charoite and Polyhalite Optical Properties during the identification of gemstone. Specific gravity of Charoite is 2.78 whereas that of Polyhalite is 2.78.