Staurolite and Adamite Physical Properties

Staurolite

Adamite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.7-3.84.32-4.48

1 7.18

1.5 Fracture

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

Uneven, Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven, Subconchoidal, Brittle, Metallic, Brittle, Metallic

1.6 Cleavage

Distinct on {010}

{101}, good; {010}, poor

1.7 Mohs Hardness

7-7.53.5

2 10

1.8 Chemical Composition

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

Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)

Staurolite and Adamite Chemical Formula

While comparing Staurolite and Adamite 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 Adamite chemical formula.

Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
Chemical formula of Adamite- Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)

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Staurolite and Adamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Staurolite and Adamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Staurolite and Adamite Optical Properties during the identification of gemstone. Specific gravity of Staurolite is 4.32-4.48 whereas that of Adamite is 4.32-4.48.