Polyhalite and Caledonite Physical Properties

Polyhalite

Caledonite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

Brittle

Soluble

2.78

Conchoidal

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

3.5

K2Ca2Mg(SO4)4·2H2O

Brittle

5.6-5.76

Uneven

[001] perfect; [100] distinct

2.5-3

Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)

Polyhalite and Caledonite Chemical Formula

While comparing Polyhalite and Caledonite 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 Caledonite chemical formula.

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Polyhalite and Caledonite Specific Gravity

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