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Opal
Opal

Demantoid
Demantoid



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Opal
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Demantoid

Opal and Demantoid Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
BrittleWalter Schumann
hot salt water
-
1.98-2.25
Conchoidal
None
5-6.5
SiO2 · nH2O
 
-
-
-
3.77-3.95
-
Imperfect
6.5
Ca 3Fe 2(SiO 4) 3Ulrich Henn and Claudio C.

Opal and Demantoid Chemical Formula

While comparing Opal and Demantoid 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 Opal and Demantoid chemical formula.

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Opal and Demantoid Specific Gravity

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