Staurolite and Fluorite Physical Properties

Staurolite

Fluorite

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Physical Properties

Tenacity

Brittle

Solubility

slightly water soluble and in hot hydrochloric acid

Durability

Specific Gravity

3.7-3.83.00-3.25

1 7.18

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Fracture

Subconchoidal, Conchoidal

Subconchoidal, Uneven, ConchoidalWalter Schumann

Cleavage

Distinct on {010}

Octahedral, perfect on {111}, parting on {011}

Mohs Hardness

7-7.54

2 10

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Chemical Composition

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

CaF₂

Staurolite and Fluorite Chemical Formula

While comparing Staurolite and Fluorite 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 Fluorite chemical formula.

Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
Chemical formula of Fluorite- CaF₂

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Staurolite and Fluorite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Staurolite and Fluorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Staurolite and Fluorite Optical Properties during the identification of gemstone. Specific gravity of Staurolite is 3.00-3.25 whereas that of Fluorite is 3.00-3.25.