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Topaz
Topaz

Herderite
Herderite



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Topaz
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Herderite

Topaz and Herderite 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
 
-
-
-
2.90-3.02
Subconchoidal, Conchoidal
Indistinct on {110}
5-5.5
CaBePO 4(F,OH)Ulrich Henn and Claudio C.

Topaz and Herderite Chemical Formula

While comparing Topaz and Herderite 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 Herderite chemical formula.

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Topaz and Herderite Specific Gravity

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