Staurolite and Plumbogummite Physical Properties

Staurolite

Plumbogummite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.7-3.84.014

1 7.18

1.5 Fracture

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

Uneven, Conchoidal

1.6 Cleavage

Distinct on {010}

None

1.7 Mohs Hardness

7-7.54-5

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 Plumbogummite Chemical Formula

While comparing Staurolite and Plumbogummite 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 Plumbogummite 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 Plumbogummite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Staurolite and Plumbogummite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Staurolite and Plumbogummite Optical Properties during the identification of gemstone. Specific gravity of Staurolite is 4.014 whereas that of Plumbogummite is 4.014.