Ruby and Cobaltite Physical Properties

Ruby

Cobaltite

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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

3.97-4.056.3

1 7.18

1.5 Fracture

Conchoidal

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

No true cleavage

{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)

Ruby and Cobaltite Chemical Formula

While comparing Ruby 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 Ruby and Cobaltite chemical formula.

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

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Ruby and Cobaltite Specific Gravity

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