Sapphirine and Spinel Physical Properties

Sapphirine

Spinel

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

none

1.3 Durability

Not Available

1.4 Specific Gravity

3.40-3.583.64-3.66

1 7.18

1.5 Fracture

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Uneven

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

{010} Perfect

None, but may exhibit slight parting

1.7 Mohs Hardness

7.58

2 10

1.8 Chemical Composition

(Al,Mg) 8(Al,Si) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

MgAl₂O₄

Sapphirine and Spinel Chemical Formula

While comparing Sapphirine and Spinel 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 Sapphirine and Spinel chemical formula.

Chemical formula of Sapphirine- (Al,Mg) 8(Al,Si) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Spinel- MgAl₂O₄

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Sapphirine and Spinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sapphirine and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sapphirine and Spinel Optical Properties during the identification of gemstone. Specific gravity of Sapphirine is 3.64-3.66 whereas that of Spinel is 3.64-3.66.