Faustite and Pyrophyllite Physical Properties

Faustite

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

2.92.65-2.90

1 7.18

1.5 Fracture

Conchoidal, ConchoidalAnthony et al, Conchoidal, Brittle, Conchoidal

Gemstones (2009), Flexible Flexible fragments.

1.6 Cleavage

{???} Indistinct

{001} Perfect

1.7 Mohs Hardness

4.5Not Available

2 10

1.8 Chemical Composition

(Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

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

Faustite and Pyrophyllite Chemical Formula

While comparing Faustite 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 Faustite and Pyrophyllite chemical formula.

Chemical formula of Faustite- (Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Faustite and Pyrophyllite Specific Gravity

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