Gahnite and Variscite Physical Properties

Gahnite

Variscite

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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

4.00-4.622.42-2.58

1 7.18

1.5 Fracture

Conchoidal, Uneven

Conchoidal, Splintery, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle

1.6 Cleavage

Indistinct parting on [111]

[010] perfect

1.7 Mohs Hardness

7.5-84-5

2 10

1.8 Chemical Composition

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

AlPO₄ · 2(H₂O)

Gahnite and Variscite Chemical Formula

While comparing Gahnite and Variscite 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 Variscite chemical formula.

Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Variscite- AlPO₄ · 2(H₂O)

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Gahnite Vs Howlite

Gahnite and Variscite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gahnite and Variscite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnite and Variscite Optical Properties during the identification of gemstone. Specific gravity of Gahnite is 2.42-2.58 whereas that of Variscite is 2.42-2.58.