Staurolite and Catapleiite Physical Properties

Staurolite

Catapleiite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.7-3.82.72

1 7.18

1.5 Fracture

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

Brittle, Metallic, Brittle, Metallic

1.6 Cleavage

Distinct on {010}

{110} Perfect, {010} Perfect

1.7 Mohs Hardness

7-7.55-6

2 10

1.8 Chemical Composition

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

Na 2ZrSi 3O 9 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Staurolite and Catapleiite Chemical Formula

While comparing Staurolite and Catapleiite 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 Catapleiite chemical formula.

Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
Chemical formula of Catapleiite- Na 2ZrSi 3O 9 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

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Staurolite and Catapleiite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Staurolite and Catapleiite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Staurolite and Catapleiite Optical Properties during the identification of gemstone. Specific gravity of Staurolite is 2.72 whereas that of Catapleiite is 2.72.