Bastnasite and Achroite Physical Properties

Bastnasite

Achroite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

4.95-5.02.90-3.40

1 7.18

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Fracture

Uneven

Uneven, ConchoidalWalter Schumann

Cleavage

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

Indiscernible

Mohs Hardness

4-57-7.5

2 10

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Chemical Composition

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

Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

Bastnasite and Achroite Chemical Formula

While comparing Bastnasite and Achroite 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 Achroite chemical formula.

Chemical formula of Bastnasite- (Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Achroite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

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Bastnasite and Achroite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bastnasite and Achroite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bastnasite and Achroite Optical Properties during the identification of gemstone. Specific gravity of Bastnasite is 2.90-3.40 whereas that of Achroite is 2.90-3.40.