Grandidierite and Fayalite Physical Properties

Grandidierite

Fayalite

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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

2.85-3.004.392

1 7.18

1.5 Fracture

Brittle, UnevenArthur Thomas, Gemstones (2009), Brittle, Uneven

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

1.6 Cleavage

Perfect

{010} moderate, {100} imperfect

1.7 Mohs Hardness

7.56.5-7

2 10

1.8 Chemical Composition

(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.

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

Grandidierite and Fayalite Chemical Formula

While comparing Grandidierite 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 Grandidierite and Fayalite chemical formula.

Chemical formula of Grandidierite- (Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
Chemical formula of Fayalite- Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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Grandidierite and Fayalite Specific Gravity

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