Andradite and Hercynite Physical Properties

Andradite

Hercynite

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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

3.70-4.104.39

1 7.18

1.5 Fracture

Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009)

ConchoidalGemdat.org, Uneven

1.6 Cleavage

none

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

1.7 Mohs Hardness

6.5-77.5-8

2 10

1.8 Chemical Composition

Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

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

Andradite and Hercynite Chemical Formula

While comparing Andradite and Hercynite 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 Andradite and Hercynite chemical formula.

Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)

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Andradite and Hercynite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andradite and Hercynite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andradite and Hercynite Optical Properties during the identification of gemstone. Specific gravity of Andradite is 4.39 whereas that of Hercynite is 4.39.