Almandine and Forsterite Physical Properties

Almandine

Forsterite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.95-4.30

3.23-3.26

1.5 Fracture

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

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

1.6 Cleavage

none

Perfect on {010} imperfect on {100}

1.7 Mohs Hardness

7-7.5

6.5-7

1.8 Chemical Composition

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

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

Almandine and Forsterite Chemical Formula

While comparing Almandine and Forsterite 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 Almandine and Forsterite chemical formula.

Chemical formula of Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Forsterite- Mg 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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Almandine and Forsterite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Almandine and Forsterite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Almandine and Forsterite Optical Properties during the identification of gemstone. Specific gravity of Almandine is 3.23-3.26 whereas that of Forsterite is 3.23-3.26.