Goethite and Fire Agate Physical Properties

Goethite

Fire Agate

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

HCl soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.27-4.292.60-2.64

1 7.18

1.5 Fracture

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

Uneven, Splintery, Conchoidal, Uneven, Splintery, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

Perfect {010}

Absent

1.7 Mohs Hardness

5-5.56.5-7

2 10

1.8 Chemical Composition

FeO(OH)Arthur Thomas , Gemstones (2009)

SiO 2Arthur Thomas , Gemstones (2009)

Goethite and Fire Agate Chemical Formula

While comparing Goethite and Fire Agate 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 Goethite and Fire Agate chemical formula.

Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
Chemical formula of Fire Agate- SiO 2Arthur Thomas , Gemstones (2009)

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Goethite and Fire Agate Specific Gravity

Another important criteria for qualitative analysis of gemstones is Goethite and Fire Agate Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Goethite and Fire Agate Optical Properties during the identification of gemstone. Specific gravity of Goethite is 2.60-2.64 whereas that of Fire Agate is 2.60-2.64.