Pearl and Goethite Physical Properties

Pearl

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

2.60-2.85

4.27-4.29

1.5 Fracture

Gemstones of the world (2001), UnevenWalter Schumann, Gemstones of the world (2001)

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

1.6 Cleavage

none

Perfect {010}

1.7 Mohs Hardness

2.5-4.5

5-5.5

1.8 Chemical Composition

Not Available

FeO(OH)Arthur Thomas , Gemstones (2009)

Pearl and Goethite Chemical Formula

While comparing Pearl 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 Pearl and Goethite chemical formula.

Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)

Compare Blue Gemstones

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Pearl Vs Precious Opal

Pearl Vs Prase Opal

Pearl and Goethite Specific Gravity

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

Blue Gemstones

Pezzottaite

Phosphosiderite

Pleonaste

Powellite

Prase

Prase Opal