Fayalite and Riebeckite Physical Properties

Fayalite

Riebeckite

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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

4.3923.28-3.44

1 7.18

1.5 Fracture

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

Uneven, Splintery, Brittle

1.6 Cleavage

{010} moderate, {100} imperfect

Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}

1.7 Mohs Hardness

6.5-75.0-6.0

2 10

1.8 Chemical Composition

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

Not Available

Fayalite and Riebeckite Chemical Formula

While comparing Fayalite and Riebeckite 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 Fayalite and Riebeckite chemical formula.

Chemical formula of Fayalite- Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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Fayalite and Riebeckite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Fayalite and Riebeckite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Fayalite and Riebeckite Optical Properties during the identification of gemstone. Specific gravity of Fayalite is 3.28-3.44 whereas that of Riebeckite is 3.28-3.44.