Goethite and Chrome-Chalcedony Physical Properties

Goethite

Chrome-Chalcedony

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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

4.27-4.292.55-2.70

1 7.18

1.5 Fracture

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

Not Available

1.6 Cleavage

Perfect {010}

Not Available

1.7 Mohs Hardness

5-5.56.5-7

2 10

1.8 Chemical Composition

FeO(OH)Arthur Thomas , Gemstones (2009)

SiO 2 (with trace Cr minerals) Gemdat.org , Management Team (2012)

Goethite and Chrome-Chalcedony Chemical Formula

While comparing Goethite and Chrome-Chalcedony 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 Chrome-Chalcedony chemical formula.

Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
Chemical formula of Chrome-Chalcedony- SiO 2 (with trace Cr minerals) Gemdat.org , Management Team (2012)

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Goethite and Chrome-Chalcedony Specific Gravity

Another important criteria for qualitative analysis of gemstones is Goethite and Chrome-Chalcedony Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Goethite and Chrome-Chalcedony Optical Properties during the identification of gemstone. Specific gravity of Goethite is 2.55-2.70 whereas that of Chrome-Chalcedony is 2.55-2.70.