Sylvite and Staurolite Physical Properties

Sylvite

Staurolite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.9933.7-3.8

1 7.18

2.5 Fracture

Uneven, Brittle

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

2.6 Cleavage

Perfect on [100], [010], [001]

Distinct on {010}

2.7 Mohs Hardness

2.57-7.5

2 10

2.11 Chemical Composition

Not Available

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

Sylvite and Staurolite Chemical Formula

While comparing Sylvite 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 Sylvite and Staurolite chemical formula.

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

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Sylvite and Staurolite Specific Gravity

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