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Sapphire
Sapphire

Ettringite
Ettringite



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Sapphire
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Ettringite

Sapphire and Ettringite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
insoluble
-
3.95-4.03
Uneven
None, but may exhibit parting
9
Al 2 O 3
 
-
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)

Sapphire and Ettringite Chemical Formula

While comparing Sapphire 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 Sapphire and Ettringite chemical formula.

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Sapphire and Ettringite Specific Gravity

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