Apatite and Bertrandite Physical Properties

Apatite

Bertrandite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.16-3.232.59-2.60

1 7.18

1.5 Fracture

Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal to uneven

Brittle, Metallic, Brittle, Metallic

1.6 Cleavage

[0001] indistinct, [1010] indistinct

{001} Perfect, {110} Distinct, {101} Distinct

1.7 Mohs Hardness

56-7

2 10

1.8 Chemical Composition

Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references

Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)

Apatite and Bertrandite Chemical Formula

While comparing Apatite and Bertrandite 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 Apatite and Bertrandite chemical formula.

Chemical formula of Apatite- Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Bertrandite- Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)

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Apatite and Bertrandite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Bertrandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Bertrandite Optical Properties during the identification of gemstone. Specific gravity of Apatite is 2.59-2.60 whereas that of Bertrandite is 2.59-2.60.