Glaucophane and Polyhalite Physical Properties

Glaucophane

Polyhalite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3-3.152.78

1 7.18

1.5 Fracture

Conchoidal, Brittle, Conchoidal

Conchoidal, Brittle

1.6 Cleavage

Good on [110] and on [001]

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

1.7 Mohs Hardness

6.0-6.53.5

2 10

1.8 Chemical Composition

[ ]Na2(Mg3Al2)Si8O22(OH)2

Not Available

Glaucophane and Polyhalite Chemical Formula

While comparing Glaucophane 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 Glaucophane and Polyhalite chemical formula.

Chemical formula of Glaucophane- [ ]Na2(Mg3Al2)Si8O22(OH)2

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Glaucophane and Polyhalite Specific Gravity

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