Jacobsite and Oligoclase Physical Properties

Jacobsite

Oligoclase

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

4.76-5.032.62-2.67

1 7.18

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Fracture

Conchoidal

Uneven

Cleavage

None

From the Greek, oligos and kasein, little cleavage.

Mohs Hardness

5.5-6.56-6.5

2 10

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Chemical Composition

(Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)

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

Jacobsite and Oligoclase Chemical Formula

While comparing Jacobsite 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 Jacobsite and Oligoclase chemical formula.

Chemical formula of Jacobsite- (Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Oligoclase- Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Brown Gemstones

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Jacobsite Vs Sonolite

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Jacobsite and Oligoclase Specific Gravity

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