Anthophyllite and Goethite Physical Properties

Anthophyllite

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

2.9-3.54.27-4.29

1 7.18

1.5 Fracture

Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, Brittle

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

1.6 Cleavage

{110} Perfect, {???} Distinct, {???} Distinct

Perfect {010}

1.7 Mohs Hardness

5.5-65-5.5

2 10

1.8 Chemical Composition

(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)

FeO(OH)Arthur Thomas , Gemstones (2009)

Anthophyllite and Goethite Chemical Formula

While comparing Anthophyllite 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 Anthophyllite and Goethite chemical formula.

Chemical formula of Anthophyllite- (Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)

Compare Brown Gemstones

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Anthophyllite and Goethite Specific Gravity

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