Hercynite and Ruby Physical Properties

Hercynite

Ruby

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.393.97-4.05

1 7.18

1.5 Fracture

ConchoidalGemdat.org, Uneven

Conchoidal

1.6 Cleavage

{111} Indistinct, {111} Indistinct, {111} Indistinct

No true cleavage

1.7 Mohs Hardness

7.5-89

2 10

1.8 Chemical Composition

Fe2+ Al 2O 4Gemdat.org , Management Team (2012)

Al ₂ O ₃

Hercynite and Ruby Chemical Formula

While comparing Hercynite 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 Hercynite and Ruby chemical formula.

Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
Chemical formula of Ruby- Al ₂ O ₃

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Hercynite and Ruby Specific Gravity

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