Hurlbutite and Goethite Physical Properties

Hurlbutite

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

2.904.27-4.29

1 7.18

1.5 Fracture

ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal

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

65-5.5

2 10

1.8 Chemical Composition

CaBe 2(PO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

FeO(OH)Arthur Thomas , Gemstones (2009)

Hurlbutite and Goethite Chemical Formula

While comparing Hurlbutite 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 Hurlbutite and Goethite chemical formula.

Chemical formula of Hurlbutite- CaBe 2(PO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)

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Hurlbutite and Goethite Specific Gravity

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