Spinel and Oligoclase Physical Properties

Spinel

Oligoclase

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

none

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.64-3.662.62-2.67

1 7.18

1.5 Fracture

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

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

1.6 Cleavage

None, but may exhibit slight parting

From the Greek, oligos and kasein, little cleavage.

1.7 Mohs Hardness

86-6.5

2 10

1.8 Chemical Composition

MgAl₂O₄

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

Spinel and Oligoclase Chemical Formula

While comparing Spinel 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 Spinel and Oligoclase chemical formula.

Chemical formula of Spinel- MgAl₂O₄
Chemical formula of Oligoclase- Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Gems for Scorpio

Spinel Vs Ametrine

Spinel Vs Azurmalachite

Spinel Vs Charoite

Spinel and Oligoclase Specific Gravity

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