Carnelian and Goethite Physical Properties

Carnelian

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

2.58-2.64

4.27-4.29

1.5 Fracture

Uneven, Splintery, Conchoidal, 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

Absent

Perfect {010}

1.7 Mohs Hardness

6.5-7

5-5.5

1.8 Chemical Composition

SiO₂

FeO(OH)Arthur Thomas , Gemstones (2009)

Carnelian and Goethite Chemical Formula

While comparing Carnelian 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 Carnelian and Goethite chemical formula.

Chemical formula of Carnelian- SiO₂
Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)

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Carnelian and Goethite Specific Gravity

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