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Astrophyllite and Hodgkinsonite Physical Properties


Hodgkinsonite and Astrophyllite Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.2-3.4   
4.06-4.08   

Fracture
Uneven, Brittle, Metallic   
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic   

Cleavage
Perfect on [001] imperfect on [100]   
{???} Perfect   

Mohs Hardness
3   
4.5-5   

Chemical Composition
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)   
Mn2+ Zn 2SiO 4(OH) 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references   

Optical Properties >>
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Astrophyllite and Hodgkinsonite Chemical Formula

While comparing Astrophyllite and Hodgkinsonite 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 Hodgkinsonite chemical formula.

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Astrophyllite and Hodgkinsonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Hodgkinsonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Hodgkinsonite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 4.06-4.08 whereas that of Hodgkinsonite is 4.06-4.08.

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Green Gemstones


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