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Brookite
Brookite

Pollucite
Pollucite



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Brookite
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Brookite and Pollucite Physical Properties

1 Physical Properties
1.1 Tenacity
Brittle
Brittle
1.2 Solubility
Not Available
Readily soluble in HF
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.87-4.14
2.86-2.94
1.5 Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
1.6 Cleavage
Poor on {120}, in traces on {001}
None observed
1.7 Mohs Hardness
5.5-6
6.5-7
1.8 Chemical Composition
TiO 2Michael 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

Brookite and Pollucite Chemical Formula

While comparing Brookite 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 Brookite and Pollucite chemical formula.

  • Chemical formula of Brookite- TiO 2Michael 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

Brookite and Pollucite Specific Gravity

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