Polyhalite and Pargasite Physical Properties

Polyhalite

Pargasite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.783.04-3.26

1 7.18

1.5 Fracture

Conchoidal, Brittle

Splintery, Brittle, Uneven

1.6 Cleavage

Perfect on {10 1 }; parting on {010}

{110} perfect

1.7 Mohs Hardness

3.55-6

2 10

1.8 Chemical Composition

Not Available

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

Polyhalite and Pargasite Chemical Formula

While comparing Polyhalite 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 Polyhalite and Pargasite chemical formula.

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

Compare Red Gemstones

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Polyhalite Vs Vanadinite

Polyhalite Vs Heliotrope

Polyhalite and Pargasite Specific Gravity

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