Cobaltite and Opal Physical Properties

Cobaltite

Opal

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1 Physical Properties

1.1 Tenacity

Not Available

BrittleWalter Schumann

1.2 Solubility

Not Available

hot salt water

1.3 Durability

Not Available

1.4 Specific Gravity

6.31.98-2.25

1 7.18

1.5 Fracture

UnevenAnthony et al, Handbook of mineralogy (2001) More from other references, UnevenAnthony et al, Handbook of mineralogy (2001) More from other references, Brittle, Metallic

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

1.6 Cleavage

{100} Good, {010} Good, {001} Good

None

1.7 Mohs Hardness

5.55-6.5

2 10

1.8 Chemical Composition

CoAsSAnthony et al , Handbook of mineralogy (2001)

SiO₂ · nH₂O

Cobaltite and Opal Chemical Formula

While comparing Cobaltite and Opal 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 Cobaltite and Opal chemical formula.

Chemical formula of Cobaltite- CoAsSAnthony et al , Handbook of mineralogy (2001)
Chemical formula of Opal- SiO₂ · nH₂O

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Cobaltite and Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cobaltite and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cobaltite and Opal Optical Properties during the identification of gemstone. Specific gravity of Cobaltite is 1.98-2.25 whereas that of Opal is 1.98-2.25.