Apatite and Diopside Physical Properties

Apatite

Diopside

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.16-3.23

3.22-3.40

1.5 Fracture

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

Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal

1.6 Cleavage

[0001] indistinct, [1010] indistinct

Distinct/good on {110}

1.7 Mohs Hardness

5-6

1.8 Chemical Composition

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

CaMgSi₂O₆

Apatite and Diopside Chemical Formula

While comparing Apatite and Diopside 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 Diopside 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 Diopside- CaMgSi₂O₆

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Apatite and Diopside Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Diopside Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Diopside Optical Properties during the identification of gemstone. Specific gravity of Apatite is 3.22-3.40 whereas that of Diopside is 3.22-3.40.