Tourmaline and Brookite Physical Properties

Tourmaline

Brookite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.85-3.353.87-4.14

1 7.18

1.5 Fracture

Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

1.6 Cleavage

Indistinct

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

1.7 Mohs Hardness

7-7.55.5-6

2 10

1.8 Chemical Composition

Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.

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

Tourmaline and Brookite Chemical Formula

While comparing Tourmaline 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 Tourmaline and Brookite chemical formula.

Chemical formula of Tourmaline- Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
Chemical formula of Brookite- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Tourmaline and Brookite Specific Gravity

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