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Boulder Opal
Boulder Opal

Umbalite
Umbalite



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Boulder Opal
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Umbalite

Boulder Opal and Umbalite 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 + H 2OUlrich Henn and Claudio C.
 
-
-
-
3.62-4.33
Uneven
Indiscernible
7-7.5
Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)

Boulder Opal and Umbalite Chemical Formula

While comparing Boulder Opal and Umbalite 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 Boulder Opal and Umbalite chemical formula.

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Boulder Opal and Umbalite Specific Gravity

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