Emerald and Apatite Physical Properties

Emerald

Apatite

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Physical Properties

Tenacity

Solubility

Durability

Hard

Specific Gravity

2.67-2.783.16-3.23

1 7.18

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Fracture

Uneven, ConchoidalWalter Schumann

Conchoidal, Uneven, Conchoidal to uneven

Cleavage

Imperfect on the [0001]

[0001] indistinct, [1010] indistinct

Mohs Hardness

7.5-85

2 10

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Chemical Composition

Be₃Al₂SiO₆

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

Emerald and Apatite Chemical Formula

While comparing Emerald 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 Emerald and Apatite chemical formula.

Chemical formula of Emerald- Be₃Al₂SiO₆
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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Emerald and Apatite Specific Gravity

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