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Astrophyllite and Sylvite Physical Properties


Sylvite and Astrophyllite Physical Properties


Physical Properties

Tenacity
Not Available   
Brittle   

Solubility
Not Available   
Soluble   

Durability
Not Available   
Not Available   

Specific Gravity
3.2-3.4   
1.993   

Fracture
Uneven, Brittle, Metallic   
Uneven, Brittle   

Cleavage
Perfect on [001] imperfect on [100]   
Perfect on [100], [010], [001]   

Mohs Hardness
3   
2.5   

Chemical Composition
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)   
Not Available   

Optical Properties >>
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Astrophyllite and Sylvite Chemical Formula

While comparing Astrophyllite and Sylvite 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 Astrophyllite and Sylvite chemical formula.

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Astrophyllite and Sylvite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Sylvite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Sylvite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 1.993 whereas that of Sylvite is 1.993.

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Green Gemstones


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