Oligoclase and Riebeckite Physical Properties

Oligoclase

Riebeckite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.62-2.673.28-3.44

1 7.18

1.5 Fracture

Gems, Sixth Edition (2006), Gems, Sixth Edition (2006), Uneven

Uneven, Splintery, Brittle

1.6 Cleavage

From the Greek, oligos and kasein, little cleavage.

Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}

1.7 Mohs Hardness

6-6.55.0-6.0

2 10

1.8 Chemical Composition

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

Not Available

Oligoclase and Riebeckite Chemical Formula

While comparing Oligoclase and Riebeckite 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 Oligoclase and Riebeckite chemical formula.

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

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Oligoclase and Riebeckite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Oligoclase and Riebeckite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Oligoclase and Riebeckite Optical Properties during the identification of gemstone. Specific gravity of Oligoclase is 3.28-3.44 whereas that of Riebeckite is 3.28-3.44.