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Mottramite
Mottramite

Crystal Opal
Crystal Opal



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Mottramite
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Crystal Opal

Mottramite and Crystal Opal Physical Properties

Physical Properties

Tenacity

Brittle
-

Solubility

Soluble
-

Durability

-
-

Specific Gravity

5.91.97-2.22
1 7.18
👆🏻

Fracture

Sub-Conchoidal
Conchoidal

Cleavage

None observed
None

Mohs Hardness

35.5-6.5
2 10
👆🏻

Chemical Composition

PbCu(VO4)(OH)
SiO 2 + H 2OUlrich Henn and Claudio C.

Mottramite and Crystal Opal Chemical Formula

While comparing Mottramite and Crystal 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 Mottramite and Crystal Opal chemical formula.

  • Chemical formula of Mottramite- PbCu(VO4)(OH)
  • Chemical formula of Crystal Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

Mottramite and Crystal Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Mottramite and Crystal Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Mottramite and Crystal Opal Optical Properties during the identification of gemstone. Specific gravity of Mottramite is 1.97-2.22 whereas that of Crystal Opal is 1.97-2.22.