Gahnite and Pyromorphite Physical Properties

Gahnite

Pyromorphite

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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

4.00-4.626.5-7.1

1 7.18

1.5 Fracture

Conchoidal, Uneven

Uneven, ConchoidalArthur Thomas, Brittle, Metallic

1.6 Cleavage

Indistinct parting on [111]

Imperfect- [10 1 1]

1.7 Mohs Hardness

7.5-83.5-4

2 10

1.8 Chemical Composition

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

Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)

Gahnite and Pyromorphite Chemical Formula

While comparing Gahnite and Pyromorphite 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 Pyromorphite chemical formula.

Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Pyromorphite- Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)

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Gahnite and Pyromorphite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gahnite and Pyromorphite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnite and Pyromorphite Optical Properties during the identification of gemstone. Specific gravity of Gahnite is 6.5-7.1 whereas that of Pyromorphite is 6.5-7.1.