Apatite and Edenite Physical Properties

Apatite

Edenite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.16-3.233.05-3.37

1 7.18

1.5 Fracture

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

Conchoidal, Brittle, Conchoidal

1.6 Cleavage

[0001] indistinct, [1010] indistinct

Good on (110)

1.7 Mohs Hardness

55-6

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

NaCa2Mg5Si7AlO22(OH)2

Apatite and Edenite Chemical Formula

While comparing Apatite and Edenite 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 Edenite 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 Edenite- NaCa2Mg5Si7AlO22(OH)2

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Apatite and Edenite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Edenite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Edenite Optical Properties during the identification of gemstone. Specific gravity of Apatite is 3.05-3.37 whereas that of Edenite is 3.05-3.37.