Gahnite and Ettringite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Partially soluble in water
Durability
Not Available
Not Available
Specific Gravity
4.00-4.62
1.77
Fracture
Conchoidal, Uneven
Not Available
Cleavage
Indistinct parting on [111]
Perfect on {10 1 0}
Mohs Hardness
7.5-8
2-2.5
Chemical Composition
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Gahnite and Ettringite Chemical Formula
While comparing Gahnite 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 Gahnite and Ettringite chemical formula.
- Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Gahnite and Ettringite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Gahnite and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnite and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Gahnite is 1.77 whereas that of Ettringite is 1.77.