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Forsterite
Forsterite

Mottramite
Mottramite



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Forsterite
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Mottramite

Forsterite and Mottramite Physical Properties

Physical Properties

Tenacity

-
Brittle

Solubility

-
Soluble

Durability

-
-

Specific Gravity

3.23-3.265.9
1 7.18
👆🏻

Fracture

Conchoidal
Sub-Conchoidal

Cleavage

Perfect on {010} imperfect on {100}
None observed

Mohs Hardness

6.5-73
2 10
👆🏻

Chemical Composition

Mg 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006)
PbCu(VO4)(OH)

Forsterite and Mottramite Chemical Formula

While comparing Forsterite and Mottramite 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 Forsterite and Mottramite chemical formula.

  • Chemical formula of Forsterite- Mg 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006)
  • Chemical formula of Mottramite- PbCu(VO4)(OH)

Forsterite and Mottramite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Forsterite and Mottramite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Forsterite and Mottramite Optical Properties during the identification of gemstone. Specific gravity of Forsterite is 5.9 whereas that of Mottramite is 5.9.