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Forsterite
Forsterite

Pleonaste
Pleonaste



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Forsterite
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Pleonaste

Forsterite and Pleonaste Physical Properties

Physical Properties

Tenacity

-
-

Solubility

-
-

Durability

-
-

Specific Gravity

3.23-3.263.80
1 7.18
👆🏻

Fracture

Conchoidal
-

Cleavage

Perfect on {010} imperfect on {100}
Indistinct

Mohs Hardness

6.5-78
2 10
👆🏻

Chemical Composition

Mg 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006)
(Mg,Fe)Al 2O 4Gemdat.org , Management Team (2012)

Forsterite and Pleonaste Chemical Formula

While comparing Forsterite and Pleonaste 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 Pleonaste chemical formula.

  • Chemical formula of Forsterite- Mg 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006)
  • Chemical formula of Pleonaste- (Mg,Fe)Al 2O 4Gemdat.org , Management Team (2012)

Forsterite and Pleonaste Specific Gravity

Another important criteria for qualitative analysis of gemstones is Forsterite and Pleonaste Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Forsterite and Pleonaste Optical Properties during the identification of gemstone. Specific gravity of Forsterite is 3.80 whereas that of Pleonaste is 3.80.