Lazulite and Cordierite Physical Properties

Lazulite

Cordierite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.04-3.172.57-2.66

1 7.18

1.5 Fracture

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

Subconchoidal, Conchoidal, Brittle

1.6 Cleavage

{001} Indistinct, {???} Indistinct

Fair on {100}, poor on {001} and {010}

1.7 Mohs Hardness

5.57-7.5

2 10

1.8 Chemical Composition

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

Mg2Al4Si5O18

Lazulite and Cordierite Chemical Formula

While comparing Lazulite and Cordierite 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 Cordierite 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 Cordierite- Mg2Al4Si5O18

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Lazulite and Cordierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Lazulite and Cordierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lazulite and Cordierite Optical Properties during the identification of gemstone. Specific gravity of Lazulite is 2.57-2.66 whereas that of Cordierite is 2.57-2.66.