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Ruby and Ettringite Physical Properties


Ettringite and Ruby Physical Properties


Physical Properties

Tenacity
Brittle   
Not Available   

Solubility
Not Available   
Partially soluble in water   

Durability
Not Available   
Not Available   

Specific Gravity
3.97-4.05   
1.77   

Fracture
Conchoidal   
Not Available   

Cleavage
No true cleavage   
Perfect on {10 1 0}   

Mohs Hardness
9   
2-2.5   

Chemical Composition
Al 2 O 3   
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)   

Optical Properties >>
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Ruby and Ettringite Chemical Formula

While comparing Ruby 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 Ruby and Ettringite chemical formula.

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Ruby and Ettringite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ruby and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ruby and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Ruby is 1.77 whereas that of Ettringite is 1.77.

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