Fayalite and Creedite Physical Properties

Fayalite

Creedite

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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

4.3922.70

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

{010} moderate, {100} imperfect

Perfect on {100}

1.7 Mohs Hardness

6.5-74.5

2 10

1.8 Chemical Composition

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

Ca 3Al 2(SO 4)(F,OH) 10Ulrich Henn and Claudio C.

Fayalite and Creedite Chemical Formula

While comparing Fayalite and Creedite 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 Creedite chemical formula.

Chemical formula of Fayalite- Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Creedite- Ca 3Al 2(SO 4)(F,OH) 10Ulrich Henn and Claudio C.

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Fayalite and Creedite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Fayalite and Creedite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Fayalite and Creedite Optical Properties during the identification of gemstone. Specific gravity of Fayalite is 2.70 whereas that of Creedite is 2.70.