Grandidierite and Cobaltite Physical Properties

Grandidierite

Cobaltite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.85-3.006.3

1 7.18

1.5 Fracture

Brittle, UnevenArthur Thomas, Gemstones (2009), Brittle, Uneven

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

Perfect

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

1.7 Mohs Hardness

7.55.5

2 10

1.8 Chemical Composition

(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.

CoAsSAnthony et al , Handbook of mineralogy (2001)

Grandidierite and Cobaltite Chemical Formula

While comparing Grandidierite 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 Grandidierite and Cobaltite chemical formula.

Chemical formula of Grandidierite- (Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
Chemical formula of Cobaltite- CoAsSAnthony et al , Handbook of mineralogy (2001)

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Grandidierite and Cobaltite Specific Gravity

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