Edenite and Polyhalite Physical Properties

Edenite

Polyhalite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.05-3.372.78

1 7.18

1.5 Fracture

Conchoidal, Brittle, Conchoidal

Conchoidal, Brittle

1.6 Cleavage

Good on (110)

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

1.7 Mohs Hardness

5-63.5

2 10

1.8 Chemical Composition

NaCa2Mg5Si7AlO22(OH)2

Not Available

Edenite and Polyhalite Chemical Formula

While comparing Edenite and Polyhalite 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 Edenite and Polyhalite chemical formula.

Chemical formula of Edenite- NaCa2Mg5Si7AlO22(OH)2

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Edenite and Polyhalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Edenite and Polyhalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Edenite and Polyhalite Optical Properties during the identification of gemstone. Specific gravity of Edenite is 2.78 whereas that of Polyhalite is 2.78.