Austinite and Oligoclase Physical Properties

Austinite

Oligoclase

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Physical Properties

Tenacity

Brittle

Solubility

Easily soluble in cold dilute HCl

Durability

Specific Gravity

4.122.62-2.67

1 7.18

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Fracture

Uneven

Cleavage

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

From the Greek, oligos and kasein, little cleavage.

Mohs Hardness

4-4.56-6.5

2 10

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Chemical Composition

CaZn(AsO4)(OH)

Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Austinite and Oligoclase Chemical Formula

While comparing Austinite and Oligoclase 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 Oligoclase chemical formula.

Chemical formula of Austinite- CaZn(AsO4)(OH)
Chemical formula of Oligoclase- Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Green Gemstones

Austinite Vs Apophyllite KF

Austinite Vs Gaspeite

Austinite Vs Gyrolite

Austinite and Oligoclase Specific Gravity

Another important criteria for qualitative analysis of gemstones is Austinite and Oligoclase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Austinite and Oligoclase Optical Properties during the identification of gemstone. Specific gravity of Austinite is 2.62-2.67 whereas that of Oligoclase is 2.62-2.67.