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Astrophyllite and Sapphire Physical Properties


Sapphire and Astrophyllite Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
insoluble   

Durability
Not Available   
Not Available   

Specific Gravity
3.2-3.4   
3.95-4.03   

Fracture
Uneven, Brittle, Metallic   
Uneven, Uneven, Gems, Sixth Edition (2006)   

Cleavage
Perfect on [001] imperfect on [100]   
None, but may exhibit parting   

Mohs Hardness
3   
9   

Chemical Composition
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)   
Al 2 O 3   

Optical Properties >>
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Astrophyllite and Sapphire Chemical Formula

While comparing Astrophyllite and Sapphire 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 Sapphire chemical formula.

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Astrophyllite and Sapphire Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Sapphire Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 3.95-4.03 whereas that of Sapphire is 3.95-4.03.

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