Oligoclase and Anorthite Physical Properties

Oligoclase

Anorthite

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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

2.62-2.672.77

1 7.18

1.5 Fracture

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

Uneven, Uneven, Gems, Sixth Edition (2006)

1.6 Cleavage

From the Greek, oligos and kasein, little cleavage.

Perfect [001] good [010] poor [110]

1.7 Mohs Hardness

6-6.56-6.5

2 10

1.8 Chemical Composition

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

CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Oligoclase and Anorthite Chemical Formula

While comparing Oligoclase and Anorthite 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 Anorthite chemical formula.

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

Compare Colorless Gems

Oligoclase Vs Phosphophyllite

Oligoclase Vs Pezzottaite

Oligoclase Vs Phenakite

Oligoclase and Anorthite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Oligoclase and Anorthite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Oligoclase and Anorthite Optical Properties during the identification of gemstone. Specific gravity of Oligoclase is 2.77 whereas that of Anorthite is 2.77.