Herderite and Staurolite Physical Properties

Herderite

Staurolite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

2.90-3.023.7-3.8

1 7.18

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Fracture

Subconchoidal, Conchoidal

Cleavage

Indistinct on {110}

Distinct on {010}

Mohs Hardness

5-5.57-7.5

2 10

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Chemical Composition

CaBePO 4(F,OH)Ulrich Henn and Claudio C.

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

Herderite and Staurolite Chemical Formula

While comparing Herderite 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 Herderite and Staurolite chemical formula.

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

Compare Colorless Gems

Herderite Vs Orthoclase

Herderite Vs Pectolite

Herderite Vs Phenakite

Herderite and Staurolite Specific Gravity

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