Polyhalite and Omphacite Physical Properties

Polyhalite

Omphacite

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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

2.783.16-3.43

1 7.18

1.5 Fracture

Conchoidal, Brittle

Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal

1.6 Cleavage

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

{110} Good, {110} Good

1.7 Mohs Hardness

3.55-6

2 10

1.8 Chemical Composition

Not Available

(Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)

Polyhalite and Omphacite Chemical Formula

While comparing Polyhalite and Omphacite 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 Omphacite chemical formula.

Chemical formula of Omphacite- (Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)

Compare Red Gemstones

Polyhalite Vs Vanadinite

Polyhalite Vs Jacinth

Polyhalite Vs Heliotrope

Polyhalite and Omphacite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Omphacite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Omphacite Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 3.16-3.43 whereas that of Omphacite is 3.16-3.43.