Beryl and Apatite Physical Properties

Beryl

Apatite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

2.60-2.903.16-3.23

1 7.18

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Fracture

Uneven, Conchoidal, Irregular

Conchoidal, Uneven, Conchoidal to uneven

Cleavage

Imperfect on {0001}

[0001] indistinct, [1010] indistinct

Mohs Hardness

7.5-85

2 10

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Chemical Composition

Be₃Al₂Si₆O₁₈

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

Beryl and Apatite Chemical Formula

While comparing Beryl 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 Beryl and Apatite chemical formula.

Chemical formula of Beryl- Be₃Al₂Si₆O₁₈
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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Beryl and Apatite Specific Gravity

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