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Erythrite
Erythrite

Ettringite
Ettringite



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Erythrite
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Ettringite

Erythrite and Ettringite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Sectile
-
-
3.06
Sectile
Perfect on {010}; poor on {100} and { 1 02}.
-9999
Co3(AsO4)2•8(H2O)
 
-
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)

Erythrite and Ettringite Chemical Formula

While comparing Erythrite 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 Erythrite and Ettringite chemical formula.

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Erythrite and Ettringite Specific Gravity

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