Achroite and Hemimorphite Physical Properties
Specific Gravity
2.90-3.40
3.30-3.50
Fracture
Uneven, ConchoidalWalter Schumann
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
Indiscernible
Perfect on {110}, poor on {101}, {001} rare
Chemical Composition
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.
Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Achroite and Hemimorphite Chemical Formula
While comparing Achroite and Hemimorphite 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 Hemimorphite 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 Hemimorphite- Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Achroite and Hemimorphite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Achroite and Hemimorphite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Achroite and Hemimorphite Optical Properties during the identification of gemstone. Specific gravity of Achroite is 3.30-3.50 whereas that of Hemimorphite is 3.30-3.50.