Faustite and Pollucite Physical Properties

Faustite

Pollucite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Readily soluble in HF

1.3 Durability

Not Available

1.4 Specific Gravity

2.92.86-2.94

1 7.18

1.5 Fracture

Conchoidal, ConchoidalAnthony et al, Conchoidal, Brittle, Conchoidal

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

{???} Indistinct

None observed

1.7 Mohs Hardness

4.56.5-7

2 10

1.8 Chemical Composition

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

(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

Faustite and Pollucite Chemical Formula

While comparing Faustite and Pollucite 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 Pollucite 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 Pollucite- (Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

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Faustite and Pollucite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Faustite and Pollucite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Faustite and Pollucite Optical Properties during the identification of gemstone. Specific gravity of Faustite is 2.86-2.94 whereas that of Pollucite is 2.86-2.94.