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Mottramite
Mottramite

Feldspar
Feldspar



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Mottramite
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Feldspar

Mottramite and Feldspar Physical Properties

Physical Properties

Tenacity

Brittle
-

Solubility

Soluble
-

Durability

-
-

Specific Gravity

5.92.56-2.75
1 7.18
👆🏻

Fracture

Sub-Conchoidal
Uneven, Conchoidal

Cleavage

None observed
two or three

Mohs Hardness

36-6.5
2 10
👆🏻

Chemical Composition

PbCu(VO4)(OH)
KAlSi3O8

Mottramite and Feldspar Chemical Formula

While comparing Mottramite and Feldspar 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 Feldspar chemical formula.

  • Chemical formula of Mottramite- PbCu(VO4)(OH)
  • Chemical formula of Feldspar- KAlSi3O8

Mottramite and Feldspar Specific Gravity

Another important criteria for qualitative analysis of gemstones is Mottramite and Feldspar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Mottramite and Feldspar Optical Properties during the identification of gemstone. Specific gravity of Mottramite is 2.56-2.75 whereas that of Feldspar is 2.56-2.75.