Galena and Brookite Physical Properties

Galena

Brookite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

6.233.87-4.14

1 7.18

1.5 Fracture

Subconchoidal, Brittle, Metallic

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

1.6 Cleavage

Cubic perfect on [001], parting on [111]

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

1.7 Mohs Hardness

2.5-2.755.5-6

2 10

1.8 Chemical Composition

PbS

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

Galena and Brookite Chemical Formula

While comparing Galena 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 Galena and Brookite chemical formula.

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

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Galena and Brookite Specific Gravity

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