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Sellaite
Sellaite

Forsterite
Forsterite



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Sellaite
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Forsterite

Sellaite and Forsterite Physical Properties

Physical Properties

Tenacity

Brittle
-

Solubility

-
-

Durability

-
-

Specific Gravity

3.14-3.163.23-3.26
1 7.18
👆🏻

Fracture

Conchoidal
Conchoidal

Cleavage

Perfect on {010} and {110}
Perfect on {010} imperfect on {100}

Mohs Hardness

5-5.56.5-7
2 10
👆🏻

Chemical Composition

MgF 2Ulrich Henn and Claudio C.
Mg 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006)

Sellaite and Forsterite Chemical Formula

While comparing Sellaite and Forsterite 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 Sellaite and Forsterite chemical formula.

  • Chemical formula of Sellaite- MgF 2Ulrich Henn and Claudio C.
  • Chemical formula of Forsterite- Mg 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006)

Sellaite and Forsterite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sellaite and Forsterite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sellaite and Forsterite Optical Properties during the identification of gemstone. Specific gravity of Sellaite is 3.23-3.26 whereas that of Forsterite is 3.23-3.26.