Corundum and Charoite Physical Properties

Corundum

Charoite

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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

3.90-4.052.54-2.78

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Difficult, Fibrous

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

None – parting in 3 directions

Good in three directions

1.7 Mohs Hardness

95-6

2 10

1.8 Chemical Composition

Al 2O 3Arthur Thomas , Gemstones (2009)

K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Corundum and Charoite Chemical Formula

While comparing Corundum and Charoite 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 Charoite chemical formula.

Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
Chemical formula of Charoite- K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Corundum and Charoite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Corundum and Charoite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Charoite Optical Properties during the identification of gemstone. Specific gravity of Corundum is 2.54-2.78 whereas that of Charoite is 2.54-2.78.