Faustite and Apophyllite Physical Properties

Faustite

Apophyllite

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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

2.92.30-2.50

1 7.18

1.5 Fracture

Conchoidal, ConchoidalAnthony et al, Conchoidal, Brittle, Conchoidal

Uneven, UnevenArthur Thomas, Gemstones (2009)

1.6 Cleavage

{???} Indistinct

Perfect on (001)

1.7 Mohs Hardness

4.54.5-5

2 10

1.8 Chemical Composition

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

KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.

Faustite and Apophyllite Chemical Formula

While comparing Faustite and Apophyllite 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 Apophyllite 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 Apophyllite- KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.

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Faustite and Apophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Faustite and Apophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Faustite and Apophyllite Optical Properties during the identification of gemstone. Specific gravity of Faustite is 2.30-2.50 whereas that of Apophyllite is 2.30-2.50.