Hematite and Austinite Physical Properties

Hematite

Austinite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

Easily soluble in cold dilute HCl

1.3 Durability

Not Available

1.4 Specific Gravity

5.00-5.304.12

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle

Brittle, Uneven, Brittle, Uneven

1.6 Cleavage

None, may show partings on {0001} and {10 1 1}

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

1.7 Mohs Hardness

64-4.5

2 10

1.8 Chemical Composition

Fe 2O 3Arthur Thomas , Gemstones (2009)

CaZn(AsO4)(OH)

Hematite and Austinite Chemical Formula

While comparing Hematite and Austinite 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 Hematite and Austinite chemical formula.

Chemical formula of Hematite- Fe 2O 3Arthur Thomas , Gemstones (2009)
Chemical formula of Austinite- CaZn(AsO4)(OH)

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Hematite and Austinite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hematite and Austinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hematite and Austinite Optical Properties during the identification of gemstone. Specific gravity of Hematite is 4.12 whereas that of Austinite is 4.12.