Pyrophyllite and Chromite Physical Properties

Pyrophyllite

Chromite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.65-2.904.5-4.8

1 7.18

1.5 Fracture

Gemstones (2009), Flexible Flexible fragments.

Uneven

1.6 Cleavage

{001} Perfect

None, parting may develop along {111}

1.7 Mohs Hardness

Not Available5.5

2 10

1.8 Chemical Composition

Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Fe++Cr2O4

Pyrophyllite and Chromite Chemical Formula

While comparing Pyrophyllite and Chromite 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 Pyrophyllite and Chromite chemical formula.

Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Chromite- Fe++Cr2O4

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Pyrophyllite and Chromite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyrophyllite and Chromite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrophyllite and Chromite Optical Properties during the identification of gemstone. Specific gravity of Pyrophyllite is 4.5-4.8 whereas that of Chromite is 4.5-4.8.