Sylvite and Oligoclase Physical Properties

Sylvite

Oligoclase

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.9932.62-2.67

1 7.18

1.5 Fracture

Uneven, Brittle

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

1.6 Cleavage

Perfect on [100], [010], [001]

From the Greek, oligos and kasein, little cleavage.

1.7 Mohs Hardness

2.56-6.5

2 10

1.8 Chemical Composition

Not Available

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

Sylvite and Oligoclase Chemical Formula

While comparing Sylvite 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 Sylvite and Oligoclase 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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Sylvite and Oligoclase Specific Gravity

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