Corundum and Microcline Physical Properties

Corundum

Microcline

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.90-4.052.55-2.63

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Difficult, Fibrous

Uneven, Uneven, Gems

1.6 Cleavage

None – parting in 3 directions

{001} Perfect, {010} Good

1.7 Mohs Hardness

96-6.5

2 10

1.8 Chemical Composition

Al 2O 3Arthur Thomas , Gemstones (2009)

KAlSi 3O 8Arthur Thomas , Gemstones (2009)

Corundum and Microcline Chemical Formula

While comparing Corundum and Microcline 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 Corundum and Microcline chemical formula.

Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
Chemical formula of Microcline- KAlSi 3O 8Arthur Thomas , Gemstones (2009)

Compare Violet Gemstones

Corundum Vs Hackmanite

Corundum Vs Hexagonite

Corundum Vs Garnet

Corundum and Microcline Specific Gravity

Another important criteria for qualitative analysis of gemstones is Corundum and Microcline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Microcline Optical Properties during the identification of gemstone. Specific gravity of Corundum is 2.55-2.63 whereas that of Microcline is 2.55-2.63.