Edenite and Apatite Physical Properties

Edenite

Apatite

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1 Physical Properties

1.2 Tenacity

Brittle

Not Available

1.5 Solubility

Not Available

1.8 Durability

Not Available

0.1 Specific Gravity

3.05-3.373.16-3.23

1 7.18

1.6 Fracture

Conchoidal, Brittle, Conchoidal

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

1.7 Cleavage

Good on (110)

[0001] indistinct, [1010] indistinct

1.8 Mohs Hardness

5-65

2 10

1.20 Chemical Composition

NaCa2Mg5Si7AlO22(OH)2

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

Edenite and Apatite Chemical Formula

While comparing Edenite 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 Edenite and Apatite chemical formula.

Chemical formula of Edenite- NaCa2Mg5Si7AlO22(OH)2
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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Edenite and Apatite Specific Gravity

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