Sapphire and Cobaltite Physical Properties

Sapphire

Cobaltite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.95-4.036.3

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Sixth Edition (2006)

UnevenAnthony et al, Handbook of mineralogy (2001) More from other references, UnevenAnthony et al, Handbook of mineralogy (2001) More from other references, Brittle, Metallic

1.6 Cleavage

None, but may exhibit parting

{100} Good, {010} Good, {001} Good

1.7 Mohs Hardness

95.5

2 10

1.8 Chemical Composition

Al ₂ O ₃

CoAsSAnthony et al , Handbook of mineralogy (2001)

Sapphire and Cobaltite Chemical Formula

While comparing Sapphire and Cobaltite 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 Sapphire and Cobaltite chemical formula.

Chemical formula of Sapphire- Al ₂ O ₃
Chemical formula of Cobaltite- CoAsSAnthony et al , Handbook of mineralogy (2001)

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Sapphire and Cobaltite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sapphire and Cobaltite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sapphire and Cobaltite Optical Properties during the identification of gemstone. Specific gravity of Sapphire is 6.3 whereas that of Cobaltite is 6.3.