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Leucite
Leucite

Pollucite
Pollucite



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Leucite
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Pollucite

Leucite and Pollucite Physical Properties

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Physical Properties

Tenacity

Brittle
Brittle

Solubility

-
Readily soluble in HF

Durability

-
-

Specific Gravity

2.45-2.502.86-2.94
1 7.18
👆🏻

Fracture

Conchoidal
Conchoidal, Uneven

Cleavage

Poor on {110}
None observed

Mohs Hardness

5.5-66.5-7
2 10
👆🏻

Chemical Composition

KAlSi 2O 6Michael O’Donoghue , 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

Leucite and Pollucite Chemical Formula

While comparing Leucite 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 Leucite and Pollucite chemical formula.

  • Chemical formula of Leucite- KAlSi 2O 6Michael O’Donoghue , 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

Leucite and Pollucite Specific Gravity

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