Faustite and Hardystonite Physical Properties

Faustite

Hardystonite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.93.396-3.443

1 7.18

1.5 Fracture

Conchoidal, ConchoidalAnthony et al, Conchoidal, Brittle, Conchoidal

Brittle, Metallic

1.6 Cleavage

{???} Indistinct

[001] good, [100] and [110] fair

1.7 Mohs Hardness

4.53-4

2 10

1.8 Chemical Composition

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

Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)

Faustite and Hardystonite Chemical Formula

While comparing Faustite and Hardystonite 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 Hardystonite 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 Hardystonite- Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)

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Faustite and Hardystonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Faustite and Hardystonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Faustite and Hardystonite Optical Properties during the identification of gemstone. Specific gravity of Faustite is 3.396-3.443 whereas that of Hardystonite is 3.396-3.443.