Polyhalite and Caledonite Physical Properties

Polyhalite

Caledonite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.785.6-5.76

1 7.18

1.5 Fracture

Conchoidal, Brittle

Uneven, UnevenAnthony et al, Handbook of mineralogy (2001)

1.6 Cleavage

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

[001] perfect; [100] distinct

1.7 Mohs Hardness

3.52.5-3

2 10

1.8 Chemical Composition

Not Available

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.

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

Compare Red Gemstones

Polyhalite Vs Vanadinite

Polyhalite Vs Heliotrope

Polyhalite Vs Jacinth

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 and Caledonite Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 5.6-5.76 whereas that of Caledonite is 5.6-5.76.