Piemontite and Gahnite Physical Properties

Piemontite

Gahnite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

Not Available4.00-4.62

1 7.18

1.5 Fracture

Uneven, Splintery

Conchoidal, Uneven

1.6 Cleavage

[001] good, [100] distinct

Indistinct parting on [111]

1.7 Mohs Hardness

6-6.57.5-8

2 10

1.8 Chemical Composition

Not Available

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

Piemontite and Gahnite Chemical Formula

While comparing Piemontite 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 Piemontite and Gahnite chemical formula.

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

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Piemontite and Gahnite Specific Gravity

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