Dumortierite and Cobaltite Physical Properties

Dumortierite

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

3.26-3.416.3

1 7.18

1.5 Fracture

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

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

Distinct on {100}, poor on {110}; parting on {001}

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

1.7 Mohs Hardness

7-8.55.5

2 10

1.8 Chemical Composition

AlAl₆O₃BSi₃O₁₈

CoAsSAnthony et al , Handbook of mineralogy (2001)

Dumortierite and Cobaltite Chemical Formula

While comparing Dumortierite 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 Dumortierite and Cobaltite chemical formula.

Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈
Chemical formula of Cobaltite- CoAsSAnthony et al , Handbook of mineralogy (2001)

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Dumortierite and Cobaltite Specific Gravity

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