Diaspore and Goethite Physical Properties

Diaspore

Goethite

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1 Physical Properties

1.1 Tenacity

Very brittle

Not Available

1.2 Solubility

insoluble

HCl soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.30-3.404.27-4.29

1 7.18

1.5 Fracture

Conchoidal, Brittle, Conchoidal

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

1.6 Cleavage

{010} perfect, {110} distinct, {100} in traces

Perfect {010}

1.7 Mohs Hardness

6.5-75-5.5

2 10

1.8 Chemical Composition

AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

FeO(OH)Arthur Thomas , Gemstones (2009)

Diaspore and Goethite Chemical Formula

While comparing Diaspore 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 Diaspore and Goethite chemical formula.

Chemical formula of Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)

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Diaspore and Goethite Specific Gravity

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