Spinel and Cobaltite Physical Properties

Spinel

Cobaltite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

none

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.64-3.666.3

1 7.18

1.5 Fracture

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

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

1.6 Cleavage

None, but may exhibit slight parting

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

1.7 Mohs Hardness

85.5

2 10

1.8 Chemical Composition

MgAl₂O₄

CoAsSAnthony et al , Handbook of mineralogy (2001)

Spinel and Cobaltite Chemical Formula

While comparing Spinel and Cobaltite 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 Spinel and Cobaltite chemical formula.

Chemical formula of Spinel- MgAl₂O₄
Chemical formula of Cobaltite- CoAsSAnthony et al , Handbook of mineralogy (2001)

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Spinel and Cobaltite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Spinel and Cobaltite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Spinel and Cobaltite Optical Properties during the identification of gemstone. Specific gravity of Spinel is 6.3 whereas that of Cobaltite is 6.3.