Hercynite and Spinel Physical Properties

Hercynite

Spinel

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

none

1.3 Durability

Not Available

1.4 Specific Gravity

4.393.64-3.66

1 7.18

1.5 Fracture

ConchoidalGemdat.org, Uneven

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

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

None, but may exhibit slight parting

1.7 Mohs Hardness

7.5-88

2 10

1.8 Chemical Composition

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

MgAl₂O₄

Hercynite and Spinel Chemical Formula

While comparing Hercynite and Spinel 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 Spinel chemical formula.

Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
Chemical formula of Spinel- MgAl₂O₄

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Hercynite and Spinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hercynite and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hercynite and Spinel Optical Properties during the identification of gemstone. Specific gravity of Hercynite is 3.64-3.66 whereas that of Spinel is 3.64-3.66.