Austinite and Bustamite Physical Properties

Austinite

Bustamite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Easily soluble in cold dilute HCl

Partly soluble in HCl.

1.3 Durability

Not Available

1.4 Specific Gravity

4.123.32-3.43

1 7.18

1.5 Fracture

Brittle, Uneven, Brittle, Uneven

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

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

{100} perfect; {110} and {1 1 0} good; {010} poor

1.7 Mohs Hardness

4-4.55.5-6

2 10

1.8 Chemical Composition

CaZn(AsO4)(OH)

(Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Austinite and Bustamite Chemical Formula

While comparing Austinite and Bustamite 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 Bustamite chemical formula.

Chemical formula of Austinite- CaZn(AsO4)(OH)
Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Austinite and Bustamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Austinite and Bustamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Austinite and Bustamite Optical Properties during the identification of gemstone. Specific gravity of Austinite is 3.32-3.43 whereas that of Bustamite is 3.32-3.43.