Apatite and Andradite Garnet Physical Properties

Apatite

Andradite Garnet

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.16-3.23

3.8-3.9

1.5 Fracture

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

Not Available

1.6 Cleavage

[0001] indistinct, [1010] indistinct

None

1.7 Mohs Hardness

6.5-7.5

1.8 Chemical Composition

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

Ca₃Fe³⁺₂Si₃O₁₂

Apatite and Andradite Garnet Chemical Formula

While comparing Apatite and Andradite Garnet 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 Andradite Garnet 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 Andradite Garnet- Ca₃Fe³⁺₂Si₃O₁₂

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Apatite and Andradite Garnet Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Andradite Garnet Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Andradite Garnet Optical Properties during the identification of gemstone. Specific gravity of Apatite is 3.8-3.9 whereas that of Andradite Garnet is 3.8-3.9.