Faustite and Bertrandite Physical Properties

Faustite

Bertrandite

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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

2.92.59-2.60

1 7.18

1.5 Fracture

Conchoidal, ConchoidalAnthony et al, Conchoidal, Brittle, Conchoidal

Brittle, Metallic, Brittle, Metallic

1.6 Cleavage

{???} Indistinct

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

1.7 Mohs Hardness

4.56-7

2 10

1.8 Chemical Composition

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

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

Faustite and Bertrandite Chemical Formula

While comparing Faustite and Bertrandite 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 Bertrandite 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 Bertrandite- Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)

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Faustite and Bertrandite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Faustite and Bertrandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Faustite and Bertrandite Optical Properties during the identification of gemstone. Specific gravity of Faustite is 2.59-2.60 whereas that of Bertrandite is 2.59-2.60.