Covellite and Pollucite Physical Properties

Covellite

Pollucite

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1 Physical Properties

1.1 Tenacity

Flexible

Brittle

1.2 Solubility

Not Available

Readily soluble in HF

1.3 Durability

Not Available

1.4 Specific Gravity

4.6-4.762.86-2.94

1 7.18

1.5 Fracture

Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic

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

1.6 Cleavage

Perfect on {0001}

None observed

1.7 Mohs Hardness

Not Available6.5-7

2 10

1.8 Chemical Composition

CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references

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

Covellite and Pollucite Chemical Formula

While comparing Covellite 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 Covellite and Pollucite chemical formula.

Chemical formula of Covellite- CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Pollucite- (Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

Compare Blue Gemstones

Covellite Vs Falcons Eye

Covellite Vs Fluorapatite

Covellite Vs Elbaite

Covellite and Pollucite Specific Gravity

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