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Forsterite
Forsterite

Pollucite
Pollucite



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Forsterite
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Pollucite

Forsterite and Pollucite Physical Properties

Physical Properties

Tenacity

-
Brittle

Solubility

-
Readily soluble in HF

Durability

-
-

Specific Gravity

3.23-3.262.86-2.94
1 7.18
👆🏻

Fracture

Conchoidal
Conchoidal, Uneven

Cleavage

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

Mohs Hardness

6.5-76.5-7
2 10
👆🏻

Chemical Composition

Mg 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006)
(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

Forsterite and Pollucite Chemical Formula

While comparing Forsterite and Pollucite 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 Pollucite chemical formula.

  • Chemical formula of Forsterite- Mg 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006)
  • Chemical formula of Pollucite- (Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

Forsterite and Pollucite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Forsterite and Pollucite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Forsterite and Pollucite Optical Properties during the identification of gemstone. Specific gravity of Forsterite is 2.86-2.94 whereas that of Pollucite is 2.86-2.94.