Goethite and Lazulite Physical Properties

Goethite

Lazulite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

HCl soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.27-4.293.04-3.17

1 7.18

1.5 Fracture

Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).

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

1.6 Cleavage

Perfect {010}

{001} Indistinct, {???} Indistinct

1.7 Mohs Hardness

5-5.55.5

2 10

1.8 Chemical Composition

FeO(OH)Arthur Thomas , Gemstones (2009)

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

Goethite and Lazulite Chemical Formula

While comparing Goethite 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 Goethite and Lazulite chemical formula.

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

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Goethite and Lazulite Specific Gravity

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