Gahnite and Purpurite Physical Properties

Gahnite

Purpurite

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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

4.00-4.623.2-3.4

1 7.18

1.5 Fracture

Conchoidal, Uneven

Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

Indistinct parting on [111]

[100] [001] perfect

1.7 Mohs Hardness

7.5-84-4.5

2 10

1.8 Chemical Composition

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

MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references

Gahnite and Purpurite Chemical Formula

While comparing Gahnite and Purpurite 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 Purpurite chemical formula.

Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references

Compare Blue Gemstones

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Gahnite Vs Howlite

Gahnite Vs Hydrogrossular

Gahnite and Purpurite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gahnite and Purpurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnite and Purpurite Optical Properties during the identification of gemstone. Specific gravity of Gahnite is 3.2-3.4 whereas that of Purpurite is 3.2-3.4.