Carnelian and Oligoclase Physical Properties

Carnelian

Oligoclase

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.58-2.64

2.62-2.67

1.5 Fracture

Uneven, Splintery, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)

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

1.6 Cleavage

Absent

From the Greek, oligos and kasein, little cleavage.

1.7 Mohs Hardness

6.5-7

6-6.5

1.8 Chemical Composition

SiO₂

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

Carnelian and Oligoclase Chemical Formula

While comparing Carnelian 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 Carnelian and Oligoclase chemical formula.

Chemical formula of Carnelian- 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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Carnelian and Oligoclase Specific Gravity

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