Hemimorphite and Pollucite Physical Properties

Hemimorphite

Pollucite

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Physical Properties

Tenacity

Brittle

Solubility

Soluble

Readily soluble in HF

Durability

Specific Gravity

3.30-3.502.86-2.94

1 7.18

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Fracture

Uneven, ConchoidalWalter Schumann, Conchoidal

Conchoidal, Uneven

Cleavage

Perfect on {110}, poor on {101}, {001} rare

None observed

Mohs Hardness

56.5-7

2 10

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Chemical Composition

Zn 4Si 2O 7(OH) 2H 2OMichael 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

Hemimorphite and Pollucite Chemical Formula

While comparing Hemimorphite 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 Hemimorphite and Pollucite chemical formula.

Chemical formula of Hemimorphite- Zn 4Si 2O 7(OH) 2H 2OMichael 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

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Hemimorphite and Pollucite Specific Gravity

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