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Forsterite
Forsterite

Beryl
Beryl



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Forsterite
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Beryl

Forsterite and Beryl Physical Properties

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Physical Properties

Tenacity

-
Brittle

Solubility

-
-

Durability

-
-

Specific Gravity

3.23-3.262.60-2.90
1 7.18
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Fracture

Conchoidal
Uneven, Conchoidal, Irregular

Cleavage

Perfect on {010} imperfect on {100}
Imperfect on {0001}

Mohs Hardness

6.5-77.5-8
2 10
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Chemical Composition

Mg 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006)
Be3Al2Si6O18

Forsterite and Beryl Chemical Formula

While comparing Forsterite and Beryl 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 Beryl chemical formula.

  • Chemical formula of Forsterite- Mg 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006)
  • Chemical formula of Beryl- Be3Al2Si6O18

Forsterite and Beryl Specific Gravity

Another important criteria for qualitative analysis of gemstones is Forsterite and Beryl Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Forsterite and Beryl Optical Properties during the identification of gemstone. Specific gravity of Forsterite is 2.60-2.90 whereas that of Beryl is 2.60-2.90.