Staurolite and Sphalerite Physical Properties

Staurolite

Sphalerite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.7-3.83.95-4.10

1 7.18

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Fracture

Subconchoidal, Conchoidal

Uneven

Cleavage

Distinct on {010}

{110} Perfect, {110} Perfect, {110} Perfect

Mohs Hardness

7-7.53.5-4

2 10

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Chemical Composition

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

(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Staurolite and Sphalerite Chemical Formula

While comparing Staurolite and Sphalerite 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 Sphalerite chemical formula.

Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
Chemical formula of Sphalerite- (Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Staurolite and Sphalerite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Staurolite and Sphalerite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Staurolite and Sphalerite Optical Properties during the identification of gemstone. Specific gravity of Staurolite is 3.95-4.10 whereas that of Sphalerite is 3.95-4.10.