Crocoite and Polyhalite Physical Properties

Crocoite

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

5.90-6.102.78

1 7.18

1.5 Fracture

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), (e.g. graphite).

Conchoidal, Brittle

1.6 Cleavage

{110} Distinct, {001} Indistinct, {100} Indistinct

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

1.7 Mohs Hardness

2.5-33.5

2 10

1.8 Chemical Composition

PbCrO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Not Available

Crocoite and Polyhalite Chemical Formula

While comparing Crocoite 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 Crocoite and Polyhalite chemical formula.

Chemical formula of Crocoite- PbCrO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Crocoite and Polyhalite Specific Gravity

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