Andradite and Fayalite Physical Properties

Andradite

Fayalite

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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

3.70-4.104.392

1 7.18

1.5 Fracture

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

Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

1.6 Cleavage

none

{010} moderate, {100} imperfect

1.7 Mohs Hardness

6.5-76.5-7

2 10

1.8 Chemical Composition

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

Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Andradite and Fayalite Chemical Formula

While comparing Andradite and Fayalite 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 Fayalite chemical formula.

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

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Andradite and Fayalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andradite and Fayalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andradite and Fayalite Optical Properties during the identification of gemstone. Specific gravity of Andradite is 4.392 whereas that of Fayalite is 4.392.