Goethite and Dioptase Physical Properties

Goethite

Dioptase

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

HCl soluble

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

4.27-4.293.25-3.35

1 7.18

1.5 Fracture

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

Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle

1.6 Cleavage

Perfect {010}

Perfect in three directions

1.7 Mohs Hardness

5-5.55

2 10

1.8 Chemical Composition

FeO(OH)Arthur Thomas , Gemstones (2009)

CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Goethite and Dioptase Chemical Formula

While comparing Goethite and Dioptase 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 Dioptase chemical formula.

Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
Chemical formula of Dioptase- CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Goethite and Dioptase Specific Gravity

Another important criteria for qualitative analysis of gemstones is Goethite and Dioptase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Goethite and Dioptase Optical Properties during the identification of gemstone. Specific gravity of Goethite is 3.25-3.35 whereas that of Dioptase is 3.25-3.35.