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Topaz
Topaz

Andradite
Andradite



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Topaz
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Andradite

Topaz and Andradite Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.49-3.57
Subconchoidal, Uneven, Conchoidal
[001] Perfect
8
Al2SiO4(F,OH)2
 
Brittle
-
-
3.70-4.10
Conchoidal, Uneven
none
6.5-7
Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Topaz and Andradite Chemical Formula

While comparing Topaz 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 Topaz and Andradite chemical formula.

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Topaz and Andradite Specific Gravity

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