Lazulite and Corundum Physical Properties

Lazulite

Corundum

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.04-3.173.90-4.05

1 7.18

1.5 Fracture

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

Uneven, Uneven, Gems, Difficult, Fibrous

1.6 Cleavage

{001} Indistinct, {???} Indistinct

None – parting in 3 directions

1.7 Mohs Hardness

5.59

2 10

1.8 Chemical Composition

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

Al 2O 3Arthur Thomas , Gemstones (2009)

Lazulite and Corundum Chemical Formula

While comparing Lazulite and Corundum 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 Lazulite and Corundum chemical formula.

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

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Lazulite and Corundum Specific Gravity

Another important criteria for qualitative analysis of gemstones is Lazulite and Corundum Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lazulite and Corundum Optical Properties during the identification of gemstone. Specific gravity of Lazulite is 3.90-4.05 whereas that of Corundum is 3.90-4.05.