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Brookite
Brookite

Austinite
Austinite



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Brookite
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Austinite

Brookite and Austinite Physical Properties

Physical Properties

Tenacity

Brittle
Brittle

Solubility

-
Easily soluble in cold dilute HCl

Durability

-
-

Specific Gravity

3.87-4.144.12
1 7.18
👆🏻

Fracture

Subconchoidal, Conchoidal
Uneven

Cleavage

Poor on {120}, in traces on {001}
Good in two directions parallel to the prism faces {110}

Mohs Hardness

5.5-64-4.5
2 10
👆🏻

Chemical Composition

TiO 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
CaZn(AsO4)(OH)

Brookite and Austinite Chemical Formula

While comparing Brookite and Austinite 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 Austinite chemical formula.

  • Chemical formula of Brookite- TiO 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
  • Chemical formula of Austinite- CaZn(AsO4)(OH)

Brookite and Austinite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Brookite and Austinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Brookite and Austinite Optical Properties during the identification of gemstone. Specific gravity of Brookite is 4.12 whereas that of Austinite is 4.12.