Ruby and Spodumene Physical Properties

Ruby

Spodumene

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.97-4.053.15-3.21

1 7.18

1.5 Fracture

Conchoidal

Uneven, Subconchoidal, Gemstones (2009)

1.6 Cleavage

No true cleavage

Perfect prismatic, two directions {110} ∧ {1 1 0} at 87°

1.7 Mohs Hardness

96-7

2 10

1.8 Chemical Composition

Al ₂ O ₃

LiAlSi₂O₆

Ruby and Spodumene Chemical Formula

While comparing Ruby and Spodumene 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 Spodumene chemical formula.

Chemical formula of Ruby- Al ₂ O ₃
Chemical formula of Spodumene- LiAlSi₂O₆

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Ruby and Spodumene Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ruby and Spodumene Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ruby and Spodumene Optical Properties during the identification of gemstone. Specific gravity of Ruby is 3.15-3.21 whereas that of Spodumene is 3.15-3.21.