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Brookite
Brookite

Anhydrite
Anhydrite



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Brookite and Anhydrite Physical Properties

1 Physical Properties
1.1 Tenacity
Brittle
Brittle
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.87-4.14
2.90-2.98
1.5 Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Conchoidal, Brittle, Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
1.6 Cleavage
Poor on {120}, in traces on {001}
Rare tabular and prismatic crystals. Usually occurs as fibrous, parallel veins that break off into cleavage fragments.
1.7 Mohs Hardness
5.5-6
3.5
1.8 Chemical Composition
TiO 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
CaSO 4Michael O’Donoghue , Gems, Sixth edition (2006) More from other references

Brookite and Anhydrite Chemical Formula

While comparing Brookite and Anhydrite 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 Anhydrite chemical formula.

  • Chemical formula of Brookite- TiO 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
  • Chemical formula of Anhydrite- CaSO 4Michael O’Donoghue , Gems, Sixth edition (2006) More from other references

Brookite and Anhydrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Brookite and Anhydrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Brookite and Anhydrite Optical Properties during the identification of gemstone. Specific gravity of Brookite is 2.90-2.98 whereas that of Anhydrite is 2.90-2.98.