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Precious Opal
Precious Opal

Astrophyllite
Astrophyllite



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Precious Opal
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Astrophyllite

Precious Opal and Astrophyllite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
1.98-2.25
Conchoidal
None
5-6.5
SiO 2 · nH 2OGemdat.org , Management Team (2012)
 
-
-
-
3.2-3.4
Uneven
Perfect on [001] imperfect on [100]
3
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

Precious Opal and Astrophyllite Chemical Formula

While comparing Precious Opal and Astrophyllite 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 Precious Opal and Astrophyllite chemical formula.

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Precious Opal and Astrophyllite Specific Gravity

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