Goethite and Star Ruby Physical Properties

Goethite

Star Ruby

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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

4.27-4.293.95-4.10

1 7.18

1.5 Fracture

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

Uneven, Uneven, Gems, Sixth Edition (2006)

1.6 Cleavage

Perfect {010}

Not Available

1.7 Mohs Hardness

5-5.5Not Available

2 10

1.8 Chemical Composition

FeO(OH)Arthur Thomas , Gemstones (2009)

Al 2O 3Michael OâDonoghue , Gems, Sixth Edition (2006)

Goethite and Star Ruby Chemical Formula

While comparing Goethite and Star Ruby 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 Star Ruby chemical formula.

Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
Chemical formula of Star Ruby- Al 2O 3Michael OâDonoghue , Gems, Sixth Edition (2006)

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Goethite and Star Ruby Specific Gravity

Another important criteria for qualitative analysis of gemstones is Goethite and Star Ruby Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Goethite and Star Ruby Optical Properties during the identification of gemstone. Specific gravity of Goethite is 3.95-4.10 whereas that of Star Ruby is 3.95-4.10.