Ruby and Obsidian Physical Properties

Ruby

Obsidian

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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

3.97-4.052.35-2.60

1 7.18

1.5 Fracture

Conchoidal

Conchoidal, ConchoidalWalter Schumann, Conchoidal

1.6 Cleavage

No true cleavage

Not Available

1.7 Mohs Hardness

95-5.5

2 10

1.8 Chemical Composition

Al ₂ O ₃

Not Available

Ruby and Obsidian Chemical Formula

While comparing Ruby and Obsidian 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 Obsidian chemical formula.

Chemical formula of Ruby- Al ₂ O ₃

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Ruby and Obsidian Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ruby and Obsidian Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ruby and Obsidian Optical Properties during the identification of gemstone. Specific gravity of Ruby is 2.35-2.60 whereas that of Obsidian is 2.35-2.60.