Bertrandite and Pyrophyllite Physical Properties

Bertrandite

Pyrophyllite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.59-2.602.65-2.90

1 7.18

1.5 Fracture

Brittle, Metallic, Brittle, Metallic

Gemstones (2009), Flexible Flexible fragments.

1.6 Cleavage

{001} Perfect, {110} Distinct, {101} Distinct

{001} Perfect

1.7 Mohs Hardness

6-7Not Available

2 10

1.8 Chemical Composition

Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)

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

Bertrandite and Pyrophyllite Chemical Formula

While comparing Bertrandite and Pyrophyllite 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 Bertrandite and Pyrophyllite chemical formula.

Chemical formula of Bertrandite- Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Bertrandite and Pyrophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bertrandite and Pyrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bertrandite and Pyrophyllite Optical Properties during the identification of gemstone. Specific gravity of Bertrandite is 2.65-2.90 whereas that of Pyrophyllite is 2.65-2.90.