Oligoclase and Calcite Physical Properties

Oligoclase

Calcite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.62-2.67

2.67-2.73

1.5 Fracture

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

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal

1.6 Cleavage

From the Greek, oligos and kasein, little cleavage.

Perfect on [10 1 1] three directions with angle of 74° 55

1.7 Mohs Hardness

6-6.5

1.8 Chemical Composition

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

CaCO 3Ulrich Henn and Claudio C.

Oligoclase and Calcite Chemical Formula

While comparing Oligoclase and Calcite 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 Calcite 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 Calcite- CaCO 3Ulrich Henn and Claudio C.

Compare Colorless Gems

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Oligoclase Vs Phosphophyllite

Oligoclase and Calcite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Oligoclase and Calcite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Oligoclase and Calcite Optical Properties during the identification of gemstone. Specific gravity of Oligoclase is 2.67-2.73 whereas that of Calcite is 2.67-2.73.