Coral and Goethite Physical Properties

Coral

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

2.60-2.70

4.27-4.29

1.5 Fracture

Irregular, Irregular, Gemstones of the world (2001)

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

3-4

5-5.5

1.8 Chemical Composition

CaCO 3Ulrich Henn and Claudio C.

FeO(OH)Arthur Thomas , Gemstones (2009)

Coral and Goethite Chemical Formula

While comparing Coral 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 Coral and Goethite chemical formula.

Chemical formula of Coral- CaCO 3Ulrich Henn and Claudio C.
Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)

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Coral and Goethite Specific Gravity

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