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Astrophyllite and Precious Opal Physical Properties


Precious Opal 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   
1.98-2.25   

Fracture
Uneven, Brittle, Metallic   
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references   

Cleavage
Perfect on [001] imperfect on [100]   
Not Available   

Mohs Hardness
3   
5-6.5   

Chemical Composition
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)   
SiO 2 · nH 2OGemdat.org , Management Team (2012)   

Optical Properties >>
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Astrophyllite and Precious Opal Chemical Formula

While comparing Astrophyllite and Precious Opal 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 Precious Opal chemical formula.

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Astrophyllite and Precious Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Precious Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Precious Opal Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 1.98-2.25 whereas that of Precious Opal is 1.98-2.25.

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Green Gemstones


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