Hercynite and Sapphire Physical Properties

Hercynite

Sapphire

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

4.393.95-4.03

1 7.18

1.5 Fracture

ConchoidalGemdat.org, Uneven

Uneven, Uneven, Gems, Sixth Edition (2006)

1.6 Cleavage

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

None, but may exhibit parting

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 Sapphire Chemical Formula

While comparing Hercynite and Sapphire 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 Sapphire chemical formula.

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

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Hercynite and Sapphire Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hercynite and Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hercynite and Sapphire Optical Properties during the identification of gemstone. Specific gravity of Hercynite is 3.95-4.03 whereas that of Sapphire is 3.95-4.03.