Oligoclase and Almandine Physical Properties

Oligoclase

Almandine

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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

2.62-2.67

3.95-4.30

1.5 Fracture

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

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

1.6 Cleavage

From the Greek, oligos and kasein, little cleavage.

none

1.7 Mohs Hardness

6-6.5

7-7.5

1.8 Chemical Composition

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

Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Oligoclase and Almandine Chemical Formula

While comparing Oligoclase and Almandine 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 Almandine 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 Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Compare Colorless Gems

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Oligoclase Vs Phenakite

Oligoclase Vs Pezzottaite

Oligoclase and Almandine Specific Gravity

Another important criteria for qualitative analysis of gemstones is Oligoclase and Almandine Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Oligoclase and Almandine Optical Properties during the identification of gemstone. Specific gravity of Oligoclase is 3.95-4.30 whereas that of Almandine is 3.95-4.30.