Bastnasite and Pyrophyllite Physical Properties

Bastnasite

Pyrophyllite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

4.95-5.02.65-2.90

1 7.18

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Fracture

Uneven

Cleavage

Imperfect to indistinct on {10 1 0}, parting on {0001}

{001} Perfect

Mohs Hardness

4-5-9999

2 10

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Chemical Composition

(Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Bastnasite and Pyrophyllite Chemical Formula

While comparing Bastnasite 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 Bastnasite and Pyrophyllite chemical formula.

Chemical formula of Bastnasite- (Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Bastnasite and Pyrophyllite Specific Gravity

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