Lazulite and Staurolite Physical Properties

Lazulite

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

3.04-3.173.7-3.8

1 7.18

1.5 Fracture

Uneven, Uneven, Gemstones of the world (2001) More from other references

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

1.6 Cleavage

{001} Indistinct, {???} Indistinct

Distinct on {010}

1.7 Mohs Hardness

5.57-7.5

2 10

1.8 Chemical Composition

(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references

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

Lazulite and Staurolite Chemical Formula

While comparing Lazulite 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 Lazulite and Staurolite chemical formula.

Chemical formula of Lazulite- (Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.

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Lazulite and Staurolite Specific Gravity

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