Foitite and Andradite Physical Properties

Foitite

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

3.173.70-4.10

1 7.18

1.5 Fracture

Handbook of mineralogy (2001)

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

1.6 Cleavage

None

none

1.7 Mohs Hardness

76.5-7

2 10

1.8 Chemical Composition

Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)

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

Foitite and Andradite Chemical Formula

While comparing Foitite 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 Foitite and Andradite chemical formula.

Chemical formula of Foitite- Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Compare Violet Gemstones

Foitite Vs Labradorite

Foitite Vs Hydrogrossular

Foitite Vs Hureaulite

Foitite and Andradite Specific Gravity

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