Tourmaline and Goethite Physical Properties

Tourmaline

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

2.85-3.354.27-4.29

1 7.18

1.5 Fracture

Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

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

1.6 Cleavage

Indistinct

Perfect {010}

1.7 Mohs Hardness

7-7.55-5.5

2 10

1.8 Chemical Composition

Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.

FeO(OH)Arthur Thomas , Gemstones (2009)

Tourmaline and Goethite Chemical Formula

While comparing Tourmaline 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 Tourmaline and Goethite chemical formula.

Chemical formula of Tourmaline- Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)

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Tourmaline and Goethite Specific Gravity

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