Pollucite and Variscite Physical Properties

Pollucite

Variscite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Readily soluble in HF

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.86-2.942.42-2.58

1 7.18

1.5 Fracture

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

Conchoidal, Splintery, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle

1.6 Cleavage

None observed

[010] perfect

1.7 Mohs Hardness

6.5-74-5

2 10

1.8 Chemical Composition

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

AlPO₄ · 2(H₂O)

Pollucite and Variscite Chemical Formula

While comparing Pollucite and Variscite 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 Pollucite and Variscite chemical formula.

Chemical formula of Pollucite- (Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Variscite- AlPO₄ · 2(H₂O)

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Pollucite and Variscite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pollucite and Variscite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pollucite and Variscite Optical Properties during the identification of gemstone. Specific gravity of Pollucite is 2.42-2.58 whereas that of Variscite is 2.42-2.58.