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Pollucite
Pollucite

Bustamite
Bustamite



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Pollucite
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Bustamite

Pollucite and Bustamite Physical Properties

1 Physical Properties
1.1 Tenacity
Brittle
Not Available
1.2 Solubility
Readily soluble in HF
Partly soluble in HCl.
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.86-2.94
3.32-3.43
1.5 Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
1.6 Cleavage
None observed
{100} perfect; {110} and {1 1 0} good; {010} poor
1.7 Mohs Hardness
6.5-7
5.5-6
1.8 Chemical Composition
(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
(Ca,Mn2+ )Si 3O 9Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Pollucite and Bustamite Chemical Formula

While comparing Pollucite and Bustamite 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 Bustamite 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 Bustamite- (Ca,Mn2+ )Si 3O 9Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Pollucite and Bustamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pollucite and Bustamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pollucite and Bustamite Optical Properties during the identification of gemstone. Specific gravity of Pollucite is 3.32-3.43 whereas that of Bustamite is 3.32-3.43.