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Spinel
Spinel

Andradite
Andradite



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Spinel
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Andradite

Spinel and Andradite Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.64-3.66
Conchoidal, Uneven
None, but may exhibit slight parting
8
MgAl2O4
 
Brittle
-
-
3.70-4.10
Conchoidal, Uneven
none
6.5-7
Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Spinel and Andradite Chemical Formula

While comparing Spinel and Andradite 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 Spinel and Andradite chemical formula.

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Spinel and Andradite Specific Gravity

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