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Mottramite
Mottramite

Anorthite
Anorthite



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Mottramite
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Anorthite

Mottramite and Anorthite Physical Properties

Physical Properties

Tenacity

Brittle
Brittle

Solubility

Soluble
-

Durability

-
-

Specific Gravity

5.92.77
1 7.18
👆🏻

Fracture

Sub-Conchoidal
Uneven

Cleavage

None observed
Perfect [001] good [010] poor [110]

Mohs Hardness

36-6.5
2 10
👆🏻

Chemical Composition

PbCu(VO4)(OH)
CaAl 2Si 2O 8Michael O’Donoghue , Gems, Sixth Edition (2006)

Mottramite and Anorthite Chemical Formula

While comparing Mottramite and Anorthite 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 Anorthite chemical formula.

  • Chemical formula of Mottramite- PbCu(VO4)(OH)
  • Chemical formula of Anorthite- CaAl 2Si 2O 8Michael O’Donoghue , Gems, Sixth Edition (2006)

Mottramite and Anorthite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Mottramite and Anorthite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Mottramite and Anorthite Optical Properties during the identification of gemstone. Specific gravity of Mottramite is 2.77 whereas that of Anorthite is 2.77.