Purpurite and Gahnite Physical Properties

Purpurite

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

3.2-3.44.00-4.62

1 7.18

1.5 Fracture

Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle

Conchoidal, Uneven

1.6 Cleavage

[100] [001] perfect

Indistinct parting on [111]

1.7 Mohs Hardness

4-4.57.5-8

2 10

1.8 Chemical Composition

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

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

Purpurite and Gahnite Chemical Formula

While comparing Purpurite 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 Purpurite and Gahnite chemical formula.

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

Compare Violet Gemstones

Purpurite Vs Sardonyx

Purpurite Vs Sapphire

Purpurite Vs Sard

Purpurite and Gahnite Specific Gravity

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