Andean Opal and Goethite Physical Properties

Andean Opal

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

Not Available

4.27-4.29

1.5 Fracture

Not Available

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

1.6 Cleavage

Not Available

Perfect {010}

1.7 Mohs Hardness

Not Available

5-5.5

1.8 Chemical Composition

Not Available

FeO(OH)Arthur Thomas , Gemstones (2009)

Andean Opal and Goethite Chemical Formula

While comparing Andean Opal 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 Andean Opal and Goethite chemical formula.

Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)

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Andean Opal and Goethite Specific Gravity

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