Hardystonite and Ettringite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Partially soluble in water
Durability
Not Available
Not Available
Specific Gravity
3.396-3.443
1.77
Fracture
Brittle, Metallic
Not Available
Cleavage
[001] good, [100] and [110] fair
Perfect on {10 1 0}
Chemical Composition
Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Hardystonite and Ettringite Chemical Formula
While comparing Hardystonite and Ettringite 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 Hardystonite and Ettringite chemical formula.
- Chemical formula of Hardystonite- Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)
- Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Hardystonite and Ettringite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Hardystonite and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hardystonite and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Hardystonite is 1.77 whereas that of Ettringite is 1.77.