Lazulite and Purpurite Physical Properties

Lazulite

Purpurite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.04-3.173.2-3.4

1 7.18

1.5 Fracture

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

Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

{001} Indistinct, {???} Indistinct

[100] [001] perfect

1.7 Mohs Hardness

5.54-4.5

2 10

1.8 Chemical Composition

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

MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references

Lazulite and Purpurite Chemical Formula

While comparing Lazulite and Purpurite 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 Purpurite 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 Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references

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Lazulite and Purpurite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Lazulite and Purpurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lazulite and Purpurite Optical Properties during the identification of gemstone. Specific gravity of Lazulite is 3.2-3.4 whereas that of Purpurite is 3.2-3.4.