Hercynite and Riebeckite Physical Properties

Hercynite

Riebeckite

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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

4.393.28-3.44

1 7.18

1.5 Fracture

ConchoidalGemdat.org, Uneven

Uneven, Splintery, Brittle

1.6 Cleavage

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

Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}

1.7 Mohs Hardness

7.5-85.0-6.0

2 10

1.8 Chemical Composition

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

Not Available

Hercynite and Riebeckite Chemical Formula

While comparing Hercynite and Riebeckite 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 Riebeckite chemical formula.

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

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Hercynite and Riebeckite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hercynite and Riebeckite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hercynite and Riebeckite Optical Properties during the identification of gemstone. Specific gravity of Hercynite is 3.28-3.44 whereas that of Riebeckite is 3.28-3.44.