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Kyanite and Goethite Physical Properties


Goethite and Kyanite Physical Properties


Physical Properties

Tenacity
Brittle   
Not Available   

Solubility
Not Available   
HCl soluble   

Durability
Not Available   
Not Available   

Specific Gravity
3.53-3.65   
4.27-4.29   

Fracture
Splintery, Brittle, Metallic   
Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).   

Cleavage
[100] perfect [010] imperfect with 79° angle between   
Perfect {010}   

Mohs Hardness
4-7   
5-5.5   

Chemical Composition
Not Available   
FeO(OH)Arthur Thomas , Gemstones (2009)   

Optical Properties >>
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Kyanite and Goethite Chemical Formula

While comparing Kyanite and Goethite 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 Kyanite and Goethite chemical formula.

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Kyanite and Goethite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kyanite and Goethite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Goethite Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 4.27-4.29 whereas that of Goethite is 4.27-4.29.

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