Legrandite and Lazulite Physical Properties

Legrandite

Lazulite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.98-4.043.04-3.17

1 7.18

1.5 Fracture

Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle

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

1.6 Cleavage

Imperfect, poor one {100}

{001} Indistinct, {???} Indistinct

1.7 Mohs Hardness

4.5-55.5

2 10

1.8 Chemical Composition

Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Legrandite and Lazulite Chemical Formula

While comparing Legrandite 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 Legrandite and Lazulite chemical formula.

Chemical formula of Legrandite- Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Lazulite- (Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references

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Legrandite and Lazulite Specific Gravity

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