Lazulite and Austinite Physical Properties

Lazulite

Austinite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Easily soluble in cold dilute HCl

1.3 Durability

Not Available

1.4 Specific Gravity

3.04-3.174.12

1 7.18

1.5 Fracture

Uneven, Uneven, Gemstones of the world (2001) More from other references

Brittle, Uneven, Brittle, Uneven

1.6 Cleavage

{001} Indistinct, {???} Indistinct

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

1.7 Mohs Hardness

5.54-4.5

2 10

1.8 Chemical Composition

(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references

CaZn(AsO4)(OH)

Lazulite and Austinite Chemical Formula

While comparing Lazulite 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 Lazulite and Austinite chemical formula.

Chemical formula of Lazulite- (Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
Chemical formula of Austinite- CaZn(AsO4)(OH)

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Lazulite and Austinite Specific Gravity

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