Polyhalite and Brookite Physical Properties

Polyhalite

Brookite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.783.87-4.14

1 7.18

1.5 Fracture

Conchoidal, Brittle

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

1.6 Cleavage

Perfect on {10 1 }; parting on {010}

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

1.7 Mohs Hardness

3.55.5-6

2 10

1.8 Chemical Composition

Not Available

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

Polyhalite and Brookite Chemical Formula

While comparing Polyhalite 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 Polyhalite and Brookite chemical formula.

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

Compare Red Gemstones

Polyhalite Vs Vanadinite

Polyhalite Vs Jacinth

Polyhalite Vs Heliotrope

Polyhalite and Brookite Specific Gravity

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