Gahnite and Legrandite Physical Properties

Gahnite

Legrandite

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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

4.00-4.623.98-4.04

1 7.18

1.5 Fracture

Conchoidal, Uneven

Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

Indistinct parting on [111]

Imperfect, poor one {100}

1.7 Mohs Hardness

7.5-84.5-5

2 10

1.8 Chemical Composition

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

Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Gahnite and Legrandite Chemical Formula

While comparing Gahnite and Legrandite 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 Gahnite and Legrandite chemical formula.

Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Legrandite- Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Gahnite and Legrandite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gahnite and Legrandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnite and Legrandite Optical Properties during the identification of gemstone. Specific gravity of Gahnite is 3.98-4.04 whereas that of Legrandite is 3.98-4.04.