Ruby and Gibbsite Physical Properties

Ruby

Gibbsite

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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

3.97-4.052.35

1 7.18

1.5 Fracture

Conchoidal

Fibrous, Difficult, Fibrous

1.6 Cleavage

No true cleavage

{001} Perfect

1.7 Mohs Hardness

92.5-3

2 10

1.8 Chemical Composition

Al ₂ O ₃

Al(OH)3

Ruby and Gibbsite Chemical Formula

While comparing Ruby and Gibbsite 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 Gibbsite chemical formula.

Chemical formula of Ruby- Al ₂ O ₃
Chemical formula of Gibbsite- Al(OH)3

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Ruby and Gibbsite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ruby and Gibbsite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ruby and Gibbsite Optical Properties during the identification of gemstone. Specific gravity of Ruby is 2.35 whereas that of Gibbsite is 2.35.