Prehnite and Oligoclase Physical Properties

Prehnite

Oligoclase

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.80-2.952.62-2.67

1 7.18

1.8 Fracture

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

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

1.9 Cleavage

Distinct on [001]

From the Greek, oligos and kasein, little cleavage.

1.10 Mohs Hardness

6-6.56-6.5

2 10

2.5 Chemical Composition

Ca₂Al₂Si₃O₁₂(OH)

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

Prehnite and Oligoclase Chemical Formula

While comparing Prehnite 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 Prehnite and Oligoclase chemical formula.

Chemical formula of Prehnite- Ca₂Al₂Si₃O₁₂(OH)
Chemical formula of Oligoclase- Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

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Prehnite and Oligoclase Specific Gravity

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