Amethyst and Oligoclase Physical Properties

Amethyst

Oligoclase

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

insoluble in common solvents

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.652.62-2.67

1 7.18

1.5 Fracture

Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)

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

1.6 Cleavage

Indiscernible

From the Greek, oligos and kasein, little cleavage.

1.7 Mohs Hardness

76-6.5

2 10

1.8 Chemical Composition

SiO₂

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

Amethyst and Oligoclase Chemical Formula

While comparing Amethyst 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 Amethyst and Oligoclase chemical formula.

Chemical formula of Amethyst- SiO₂
Chemical formula of Oligoclase- Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

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Amethyst and Oligoclase Specific Gravity

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