Diaspore and Austinite Physical Properties

Diaspore

Austinite

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1 Physical Properties

1.1 Tenacity

Very brittle

Brittle

1.2 Solubility

insoluble

Easily soluble in cold dilute HCl

1.3 Durability

Not Available

1.4 Specific Gravity

3.30-3.404.12

1 7.18

1.5 Fracture

Conchoidal, Brittle, Conchoidal

Brittle, Uneven, Brittle, Uneven

1.6 Cleavage

{010} perfect, {110} distinct, {100} in traces

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

1.7 Mohs Hardness

6.5-74-4.5

2 10

1.8 Chemical Composition

AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

CaZn(AsO4)(OH)

Diaspore and Austinite Chemical Formula

While comparing Diaspore 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 Diaspore and Austinite chemical formula.

Chemical formula of Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Austinite- CaZn(AsO4)(OH)

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Diaspore and Austinite Specific Gravity

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