Apatite and Norbergite Physical Properties

Apatite

Norbergite

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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

3.16-3.23

3.177

1.5 Fracture

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

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

1.6 Cleavage

[0001] indistinct, [1010] indistinct

{???} Distinct

1.7 Mohs Hardness

6-6.5

1.8 Chemical Composition

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

Mg 3(SiO 4)(F,OH) 2Anthony et al , Handbook of Mineralogy (2001)

Apatite and Norbergite Chemical Formula

While comparing Apatite and Norbergite 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 Norbergite 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 Norbergite- Mg 3(SiO 4)(F,OH) 2Anthony et al , Handbook of Mineralogy (2001)

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Apatite and Norbergite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Norbergite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Norbergite Optical Properties during the identification of gemstone. Specific gravity of Apatite is 3.177 whereas that of Norbergite is 3.177.