Riebeckite and Apatite Physical Properties

Riebeckite

Apatite

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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

3.28-3.443.16-3.23

1 7.18

1.5 Fracture

Uneven, Splintery, Brittle

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

1.6 Cleavage

Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}

[0001] indistinct, [1010] indistinct

1.7 Mohs Hardness

5.0-6.05

2 10

1.8 Chemical Composition

Not Available

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

Riebeckite and Apatite Chemical Formula

While comparing Riebeckite and Apatite 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 Riebeckite and Apatite 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

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Riebeckite and Apatite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Riebeckite and Apatite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Riebeckite and Apatite Optical Properties during the identification of gemstone. Specific gravity of Riebeckite is 3.16-3.23 whereas that of Apatite is 3.16-3.23.