Ruby and Apatite Physical Properties

Ruby

Apatite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.97-4.053.16-3.23

1 7.18

1.5 Fracture

Conchoidal

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

1.6 Cleavage

No true cleavage

[0001] indistinct, [1010] indistinct

1.7 Mohs Hardness

2 10

1.8 Chemical Composition

Al ₂ O ₃

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

Ruby and Apatite Chemical Formula

While comparing Ruby 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 Ruby and Apatite chemical formula.

Chemical formula of Ruby- Al ₂ O ₃
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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Ruby and Apatite Specific Gravity

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