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Austinite
Austinite

Ettringite
Ettringite



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Austinite
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Ettringite

Austinite and Ettringite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
Easily soluble in cold dilute HCl
-
4.12
Uneven
Good in two directions parallel to the prism faces {110}
4-4.5
CaZn(AsO4)(OH)
 
-
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)

Austinite and Ettringite Chemical Formula

While comparing Austinite 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 Austinite and Ettringite chemical formula.

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Austinite and Ettringite Specific Gravity

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