Grossular and Oligoclase Physical Properties

Grossular

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

3.55-3.732.62-2.67

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

none

From the Greek, oligos and kasein, little cleavage.

1.7 Mohs Hardness

7-7.56-6.5

2 10

1.8 Chemical Composition

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

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

Grossular and Oligoclase Chemical Formula

While comparing Grossular 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 Grossular and Oligoclase chemical formula.

Chemical formula of Grossular- Ca 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Oligoclase- Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

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Grossular and Oligoclase Specific Gravity

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