Polyhalite and Pleonaste Physical Properties

Polyhalite

Pleonaste

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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

2.783.80

1 7.18

1.5 Fracture

Conchoidal, Brittle

Not Available

1.6 Cleavage

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

Not Available

1.7 Mohs Hardness

3.58

2 10

1.8 Chemical Composition

Not Available

(Mg,Fe)Al 2O 4Gemdat.org , Management Team (2012)

Polyhalite and Pleonaste Chemical Formula

While comparing Polyhalite and Pleonaste 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 Pleonaste chemical formula.

Chemical formula of Pleonaste- (Mg,Fe)Al 2O 4Gemdat.org , Management Team (2012)

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Polyhalite and Pleonaste Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Pleonaste Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Pleonaste Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 3.80 whereas that of Pleonaste is 3.80.