Brookite and Esperite Physical Properties

Brookite

Esperite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.87-4.144.28-4.42

1 7.18

1.5 Fracture

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

Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Metallic

1.6 Cleavage

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

Distinct on [010] and [100] poor on [101]

1.7 Mohs Hardness

5.5-65-5.5

2 10

1.8 Chemical Composition

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

PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)

Brookite and Esperite Chemical Formula

While comparing Brookite and Esperite 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 Esperite chemical formula.

Chemical formula of Brookite- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Esperite- PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)

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Brookite and Esperite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Brookite and Esperite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Brookite and Esperite Optical Properties during the identification of gemstone. Specific gravity of Brookite is 4.28-4.42 whereas that of Esperite is 4.28-4.42.