Polyhalite and Crocoite Physical Properties

Polyhalite

Crocoite

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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

2.785.90-6.10

1 7.18

1.5 Fracture

Conchoidal, Brittle

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

1.6 Cleavage

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

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

1.7 Mohs Hardness

3.52.5-3

2 10

1.8 Chemical Composition

Not Available

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

Polyhalite and Crocoite Chemical Formula

While comparing Polyhalite and Crocoite 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 Crocoite chemical formula.

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

Compare Red Gemstones

Polyhalite Vs Vanadinite

Polyhalite Vs Heliotrope

Polyhalite Vs Jacinth

Polyhalite and Crocoite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Crocoite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Crocoite Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 5.90-6.10 whereas that of Crocoite is 5.90-6.10.