Lazulite and Goethite Physical Properties

Lazulite

Goethite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

HCl soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.04-3.174.27-4.29

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

{001} Indistinct, {???} Indistinct

Perfect {010}

1.7 Mohs Hardness

5.55-5.5

2 10

1.8 Chemical Composition

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

FeO(OH)Arthur Thomas , Gemstones (2009)

Lazulite and Goethite Chemical Formula

While comparing Lazulite and Goethite 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 Goethite 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 Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)

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Lazulite and Goethite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Lazulite and Goethite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lazulite and Goethite Optical Properties during the identification of gemstone. Specific gravity of Lazulite is 4.27-4.29 whereas that of Goethite is 4.27-4.29.