Omphacite and Goethite Physical Properties

Omphacite

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

3.16-3.434.27-4.29

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal

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

1.6 Cleavage

{110} Good, {110} Good

Perfect {010}

1.7 Mohs Hardness

5-65-5.5

2 10

1.8 Chemical Composition

(Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)

FeO(OH)Arthur Thomas , Gemstones (2009)

Omphacite and Goethite Chemical Formula

While comparing Omphacite 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 Omphacite and Goethite chemical formula.

Chemical formula of Omphacite- (Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)
Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)

Compare Green Gemstones

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Omphacite Vs Powellite

Omphacite and Goethite Specific Gravity

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