Oligoclase and Prehnite Physical Properties

Oligoclase

Prehnite

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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

2.62-2.672.80-2.95

1 7.18

1.5 Fracture

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

Uneven, Yellow, White, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic

1.6 Cleavage

From the Greek, oligos and kasein, little cleavage.

Distinct on [001]

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)

Ca₂Al₂Si₃O₁₂(OH)

Oligoclase and Prehnite Chemical Formula

While comparing Oligoclase and Prehnite 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 Prehnite 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 Prehnite- Ca₂Al₂Si₃O₁₂(OH)

Compare Colorless Gems

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Oligoclase Vs Phosphophyllite

Oligoclase and Prehnite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Oligoclase and Prehnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Oligoclase and Prehnite Optical Properties during the identification of gemstone. Specific gravity of Oligoclase is 2.80-2.95 whereas that of Prehnite is 2.80-2.95.