Bastnasite and Sellaite Physical Properties

Bastnasite

Sellaite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

4.95-5.03.14-3.16

1 7.18

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Fracture

Uneven

Conchoidal

Cleavage

Imperfect to indistinct on {10 1 0}, parting on {0001}

Perfect on {010} and {110}

Mohs Hardness

4-55-5.5

2 10

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Chemical Composition

(Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

MgF 2Ulrich Henn and Claudio C.

Bastnasite and Sellaite Chemical Formula

While comparing Bastnasite and Sellaite 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 Bastnasite and Sellaite chemical formula.

Chemical formula of Bastnasite- (Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Sellaite- MgF 2Ulrich Henn and Claudio C.

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Bastnasite and Sellaite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bastnasite and Sellaite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bastnasite and Sellaite Optical Properties during the identification of gemstone. Specific gravity of Bastnasite is 3.14-3.16 whereas that of Sellaite is 3.14-3.16.