Polyhalite and Lazulite Physical Properties

Polyhalite

Lazulite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.783.04-3.17

1 7.18

1.5 Fracture

Conchoidal, Brittle

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

1.6 Cleavage

Perfect on {10 1 }; parting on {010}

{001} Indistinct, {???} Indistinct

1.7 Mohs Hardness

3.55.5

2 10

1.8 Chemical Composition

Not Available

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

Polyhalite and Lazulite Chemical Formula

While comparing Polyhalite 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 Polyhalite and Lazulite chemical formula.

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

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Polyhalite and Lazulite Specific Gravity

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