Sapphire and Oligoclase Physical Properties

Sapphire

Oligoclase

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.95-4.032.62-2.67

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Sixth Edition (2006)

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

1.6 Cleavage

None, but may exhibit parting

From the Greek, oligos and kasein, little cleavage.

1.7 Mohs Hardness

96-6.5

2 10

1.8 Chemical Composition

Al ₂ O ₃

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

Sapphire and Oligoclase Chemical Formula

While comparing Sapphire 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 Sapphire and Oligoclase chemical formula.

Chemical formula of Sapphire- Al ₂ O ₃
Chemical formula of Oligoclase- Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

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Sapphire and Oligoclase Specific Gravity

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