Gahnite and Andradite Physical Properties

Gahnite

Andradite

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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

4.00-4.623.70-4.10

1 7.18

1.5 Fracture

Conchoidal, Uneven

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

1.6 Cleavage

Indistinct parting on [111]

none

1.7 Mohs Hardness

7.5-86.5-7

2 10

1.8 Chemical Composition

ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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

Gahnite and Andradite Chemical Formula

While comparing Gahnite and Andradite 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 Gahnite and Andradite chemical formula.

Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Compare Blue Gemstones

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Gahnite Vs Hydrogrossular

Gahnite Vs Howlite

Gahnite and Andradite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gahnite and Andradite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnite and Andradite Optical Properties during the identification of gemstone. Specific gravity of Gahnite is 3.70-4.10 whereas that of Andradite is 3.70-4.10.