Staurolite and Rosasite Physical Properties

Staurolite

Rosasite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

Effervesces in cold

1.3 Durability

Not Available

1.4 Specific Gravity

3.7-3.84-4.2

1 7.18

1.5 Fracture

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

Splintery

1.6 Cleavage

Distinct on {010}

Perfect on {100} and {010}

1.7 Mohs Hardness

7-7.54

2 10

1.8 Chemical Composition

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

Not Available

Staurolite and Rosasite Chemical Formula

While comparing Staurolite and Rosasite 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 Rosasite 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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Staurolite and Rosasite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Staurolite and Rosasite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Staurolite and Rosasite Optical Properties during the identification of gemstone. Specific gravity of Staurolite is 4-4.2 whereas that of Rosasite is 4-4.2.