Phlogopite and Faustite Physical Properties

Phlogopite

Faustite

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1 Physical Properties

1.1 Tenacity

Tough

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.78-2.852.9

1 7.18

1.5 Fracture

None, Uneven

Conchoidal, ConchoidalAnthony et al, Conchoidal, Brittle, Conchoidal

1.6 Cleavage

Perfect basal (001)

{???} Indistinct

1.7 Mohs Hardness

2-2.54.5

2 10

1.8 Chemical Composition

Not Available

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

Phlogopite and Faustite Chemical Formula

While comparing Phlogopite and Faustite 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 Phlogopite and Faustite chemical formula.

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

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Phlogopite and Faustite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Phlogopite and Faustite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Phlogopite and Faustite Optical Properties during the identification of gemstone. Specific gravity of Phlogopite is 2.9 whereas that of Faustite is 2.9.