Variscite and Staurolite Physical Properties

Variscite

Staurolite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.42-2.583.7-3.8

1 7.18

1.5 Fracture

Conchoidal, Splintery, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle

Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

1.6 Cleavage

[010] perfect

Distinct on {010}

1.7 Mohs Hardness

4-57-7.5

2 10

1.8 Chemical Composition

AlPO₄ · 2(H₂O)

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

Variscite and Staurolite Chemical Formula

While comparing Variscite and Staurolite 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 Variscite and Staurolite chemical formula.

Chemical formula of Variscite- AlPO₄ · 2(H₂O)
Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.

Compare Gems for Virgo

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Variscite Vs Garnet

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Variscite and Staurolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Variscite and Staurolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Variscite and Staurolite Optical Properties during the identification of gemstone. Specific gravity of Variscite is 3.7-3.8 whereas that of Staurolite is 3.7-3.8.