Atacamite and Pargasite Physical Properties

Atacamite

Pargasite

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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

3.745-3.7763.04-3.26

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Brittle

Splintery, Brittle, Uneven

1.6 Cleavage

Perfect on {010}, fair on {101}

{110} perfect

1.7 Mohs Hardness

3-3.55-6

2 10

1.8 Chemical Composition

Cu2Cl(OH)3

NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

Atacamite and Pargasite Chemical Formula

While comparing Atacamite and Pargasite 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 Atacamite and Pargasite chemical formula.

Chemical formula of Atacamite- Cu2Cl(OH)3
Chemical formula of Pargasite- NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

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Atacamite and Pargasite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Atacamite and Pargasite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Atacamite and Pargasite Optical Properties during the identification of gemstone. Specific gravity of Atacamite is 3.04-3.26 whereas that of Pargasite is 3.04-3.26.