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Herderite
Herderite

Black Opal
Black Opal



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Herderite
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Black Opal

Herderite and Black Opal Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.90-3.02
Subconchoidal, Conchoidal
Indistinct on {110}
5-5.5
CaBePO 4(F,OH)Ulrich Henn and Claudio C.
 
-
-
-
1.97-2.22
Conchoidal
None
6-6.5
SiO 2 + H 2OUlrich Henn and Claudio C.

Herderite and Black Opal Chemical Formula

While comparing Herderite and Black Opal 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 Herderite and Black Opal chemical formula.

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Herderite and Black Opal Specific Gravity

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