Apatite and Emerald Physical Properties

Apatite

Emerald

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

Hard

1.4 Specific Gravity

3.16-3.23

2.67-2.78

1.5 Fracture

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

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

[0001] indistinct, [1010] indistinct

Imperfect on the [0001]

1.7 Mohs Hardness

7.5-8

1.8 Chemical Composition

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

Be₃Al₂SiO₆

Apatite and Emerald Chemical Formula

While comparing Apatite and Emerald 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 Emerald 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 Emerald- Be₃Al₂SiO₆

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Apatite and Emerald Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Emerald Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Emerald Optical Properties during the identification of gemstone. Specific gravity of Apatite is 2.67-2.78 whereas that of Emerald is 2.67-2.78.