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Goethite and Topaz Physical Properties


Topaz and Goethite Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
HCl soluble   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
4.27-4.29   
3.49-3.57   

Fracture
Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).   
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle   

Cleavage
Perfect {010}   
[001] Perfect   

Mohs Hardness
5-5.5   
8   

Chemical Composition
FeO(OH)Arthur Thomas , Gemstones (2009)   
Al2SiO4(F,OH)2   

Optical Properties >>
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Goethite and Topaz Chemical Formula

While comparing Goethite and Topaz 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 Goethite and Topaz chemical formula.

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Goethite and Topaz Specific Gravity

Another important criteria for qualitative analysis of gemstones is Goethite and Topaz Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Goethite and Topaz Optical Properties during the identification of gemstone. Specific gravity of Goethite is 3.49-3.57 whereas that of Topaz is 3.49-3.57.

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Brown Gemstones


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