Antigorite and Goethite Physical Properties

Antigorite

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

2.58-2.804.27-4.29

1 7.18

1.5 Fracture

Conchoidal, Brittle, Metallic, Conchoidal, Handbook of mineralogy (2001)

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

1.6 Cleavage

{001} Good

Perfect {010}

1.7 Mohs Hardness

5-5.55-5.5

2 10

1.8 Chemical Composition

(Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)

FeO(OH)Arthur Thomas , Gemstones (2009)

Antigorite and Goethite Chemical Formula

While comparing Antigorite 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 Antigorite and Goethite chemical formula.

Chemical formula of Antigorite- (Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)

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Antigorite and Goethite Specific Gravity

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