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Fire Opal
Fire Opal

Spinel
Spinel



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Fire Opal
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Spinel

Fire Opal and Spinel Physical Properties

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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
 
-
-
-
3.64-3.66
Conchoidal, Uneven
None, but may exhibit slight parting
8
MgAl2O4

Fire Opal and Spinel Chemical Formula

While comparing Fire Opal and Spinel 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 Spinel chemical formula.

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Fire Opal and Spinel Specific Gravity

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