Kyanite and Ruby Physical Properties

Kyanite

Ruby

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1 Physical Properties

1.1 Tenacity

Brittle

1.3 Solubility

Not Available

1.6 Durability

Not Available

1.9 Specific Gravity

3.53-3.653.97-4.05

1 7.18

1.11 Fracture

Splintery, Brittle, Metallic

Conchoidal

1.12 Cleavage

[100] perfect [010] imperfect with 79° angle between

No true cleavage

1.13 Mohs Hardness

4-79

2 10

1.14 Chemical Composition

Not Available

Al ₂ O ₃

Kyanite and Ruby Chemical Formula

While comparing Kyanite and Ruby 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 Kyanite and Ruby chemical formula.

Chemical formula of Ruby- Al ₂ O ₃

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Kyanite Vs Kashmir sapphire

Kyanite and Ruby Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kyanite and Ruby Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Ruby Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 3.97-4.05 whereas that of Ruby is 3.97-4.05.