Topaz and Brookite Physical Properties

Topaz

Brookite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.49-3.573.87-4.14

1 7.18

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Fracture

Subconchoidal, Uneven, Conchoidal

Subconchoidal, Conchoidal

Cleavage

[001] Perfect

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

Mohs Hardness

85.5-6

2 10

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Chemical Composition

Al₂SiO₄(F,OH)₂

TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Topaz and Brookite Chemical Formula

While comparing Topaz and Brookite 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 Topaz and Brookite chemical formula.

Chemical formula of Topaz- Al₂SiO₄(F,OH)₂
Chemical formula of Brookite- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Gems for Sagittarius

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Topaz Vs Pietersite

Topaz Vs Quartz Smoky

Topaz and Brookite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Topaz and Brookite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Brookite Optical Properties during the identification of gemstone. Specific gravity of Topaz is 3.87-4.14 whereas that of Brookite is 3.87-4.14.