Lazulite and Gahnite Physical Properties

Lazulite

Gahnite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.04-3.174.00-4.62

1 7.18

1.5 Fracture

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

Conchoidal, Uneven

1.6 Cleavage

{001} Indistinct, {???} Indistinct

Indistinct parting on [111]

1.7 Mohs Hardness

5.57.5-8

2 10

1.8 Chemical Composition

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

ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Lazulite and Gahnite Chemical Formula

While comparing Lazulite and Gahnite 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 Gahnite 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 Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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Lazulite and Gahnite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Lazulite and Gahnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lazulite and Gahnite Optical Properties during the identification of gemstone. Specific gravity of Lazulite is 4.00-4.62 whereas that of Gahnite is 4.00-4.62.