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Astrophyllite and Beryllonite Physical Properties


Beryllonite and Astrophyllite Physical Properties


Physical Properties

Tenacity
Not Available   
Brittle   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.2-3.4   
2.79-2.87   

Fracture
Uneven, Brittle, Metallic   
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal   

Cleavage
Perfect on [001] imperfect on [100]   
{010} perfect; {100} good, interrupted; {101} indistinct; {001} in traces   

Mohs Hardness
3   
5.5-6   

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

Optical Properties >>
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Astrophyllite and Beryllonite Chemical Formula

While comparing Astrophyllite and Beryllonite 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 Beryllonite chemical formula.

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Astrophyllite and Beryllonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Beryllonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Beryllonite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 2.79-2.87 whereas that of Beryllonite is 2.79-2.87.

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