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Fire Opal
Fire Opal

Astrophyllite
Astrophyllite



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Fire Opal
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Astrophyllite

Fire Opal and Astrophyllite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
1.97-2.22
Conchoidal
None
6-6.5
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001) More from other references
 
-
-
-
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)

Fire Opal and Astrophyllite Chemical Formula

While comparing Fire 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 Fire Opal and Astrophyllite chemical formula.

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Fire Opal and Astrophyllite Specific Gravity

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