Corundum and Lazulite Physical Properties

Corundum

Lazulite

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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

3.90-4.053.04-3.17

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Difficult, Fibrous

Uneven, Uneven, Gemstones of the world (2001) More from other references

1.6 Cleavage

None – parting in 3 directions

{001} Indistinct, {???} Indistinct

1.7 Mohs Hardness

95.5

2 10

1.8 Chemical Composition

Al 2O 3Arthur Thomas , Gemstones (2009)

(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references

Corundum and Lazulite Chemical Formula

While comparing Corundum and Lazulite 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 Lazulite chemical formula.

Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
Chemical formula of Lazulite- (Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references

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Corundum and Lazulite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Corundum and Lazulite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Lazulite Optical Properties during the identification of gemstone. Specific gravity of Corundum is 3.04-3.17 whereas that of Lazulite is 3.04-3.17.