Staurolite and Forsterite Physical Properties

Staurolite

Forsterite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.7-3.83.23-3.26

1 7.18

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Fracture

Subconchoidal, Conchoidal

Conchoidal

Cleavage

Distinct on {010}

Perfect on {010} imperfect on {100}

Mohs Hardness

7-7.56.5-7

2 10

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Chemical Composition

(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.

Mg 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Staurolite and Forsterite Chemical Formula

While comparing Staurolite 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 Staurolite and Forsterite chemical formula.

Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
Chemical formula of Forsterite- Mg 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Brown Gemstones

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Staurolite and Forsterite Specific Gravity

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