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Ettringite
Ettringite

Gahnite
Gahnite



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Ettringite
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Gahnite

Ettringite and Gahnite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
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Partially soluble in water
-
1.77
-
Perfect on {10 1 0}
2-2.5
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)
 
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-
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4.00-4.62
Conchoidal, Uneven
Indistinct parting on [111]
7.5-8
ZnAl 2O 4Michael O’Donoghue , Gems, Sixth Edition (2006)

Ettringite and Gahnite Chemical Formula

While comparing Ettringite and Gahnite 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 Ettringite and Gahnite chemical formula.

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Ettringite and Gahnite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Gahnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite Vs Gahnite during the identification of gemstone. Specific gravity of Ettringite is whereas that of Gahnite is .