Agate and Staurolite Physical Properties

Agate

Staurolite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.60-2.64

3.7-3.8

1.5 Fracture

Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)

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

1.6 Cleavage

Indiscernible

Distinct on {010}

1.7 Mohs Hardness

6.5-7

7-7.5

1.8 Chemical Composition

SiO₂

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

Agate and Staurolite Chemical Formula

While comparing Agate 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 Agate and Staurolite chemical formula.

Chemical formula of Agate- SiO₂
Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.

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Agate and Staurolite Specific Gravity

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