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Ettringite
Ettringite

Bertrandite
Bertrandite



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Ettringite
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Bertrandite

Ettringite and Bertrandite 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
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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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2.59-2.60
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{001} Perfect, {110} Distinct, {101} Distinct
6-7
Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)

Ettringite and Bertrandite Chemical Formula

While comparing Ettringite and Bertrandite 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 Bertrandite chemical formula.

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Ettringite and Bertrandite Specific Gravity

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