Austinite and Fayalite Physical Properties

Austinite

Fayalite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Easily soluble in cold dilute HCl

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.124.392

1 7.18

1.5 Fracture

Brittle, Uneven, Brittle, Uneven

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

1.6 Cleavage

Good in two directions parallel to the prism faces {110}

{010} moderate, {100} imperfect

1.7 Mohs Hardness

4-4.56.5-7

2 10

1.8 Chemical Composition

CaZn(AsO4)(OH)

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

Austinite and Fayalite Chemical Formula

While comparing Austinite 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 Austinite and Fayalite chemical formula.

Chemical formula of Austinite- CaZn(AsO4)(OH)
Chemical formula of Fayalite- Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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Austinite and Fayalite Specific Gravity

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