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Brookite
Brookite

Neptunite
Neptunite



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Brookite
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Brookite and Neptunite Physical Properties

Physical Properties

Tenacity

Brittle
Brittle

Solubility

-
-

Durability

-
-

Specific Gravity

3.87-4.143.19-3.23
1 7.18
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Fracture

Subconchoidal, Conchoidal
Conchoidal

Cleavage

Poor on {120}, in traces on {001}
{110} good

Mohs Hardness

5.5-65-6
2 10
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Chemical Composition

TiO 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael O’Donoghue , Gems, Sixth Edition (2006)

Brookite and Neptunite Chemical Formula

While comparing Brookite and Neptunite 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 Neptunite chemical formula.

  • Chemical formula of Brookite- TiO 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
  • Chemical formula of Neptunite- KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael O’Donoghue , Gems, Sixth Edition (2006)

Brookite and Neptunite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Brookite and Neptunite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Brookite and Neptunite Optical Properties during the identification of gemstone. Specific gravity of Brookite is 3.19-3.23 whereas that of Neptunite is 3.19-3.23.