Faustite and Purpurite Physical Properties

Faustite

Purpurite

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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

2.93.2-3.4

1 7.18

1.5 Fracture

Conchoidal, ConchoidalAnthony et al, Conchoidal, Brittle, Conchoidal

Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

{???} Indistinct

[100] [001] perfect

1.7 Mohs Hardness

4.54-4.5

2 10

1.8 Chemical Composition

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

MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references

Faustite and Purpurite Chemical Formula

While comparing Faustite and Purpurite 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 Purpurite 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 Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references

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Faustite and Purpurite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Faustite and Purpurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Faustite and Purpurite Optical Properties during the identification of gemstone. Specific gravity of Faustite is 3.2-3.4 whereas that of Purpurite is 3.2-3.4.