Tanzanite and Cobaltite Physical Properties

Tanzanite

Cobaltite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Hard

Not Available

1.4 Specific Gravity

3.356.3

1 7.18

1.5 Fracture

Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)

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 {010}, imperfect {100}

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

1.7 Mohs Hardness

6.5-75.5

2 10

1.8 Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

CoAsSAnthony et al , Handbook of mineralogy (2001)

Tanzanite and Cobaltite Chemical Formula

While comparing Tanzanite 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 Tanzanite and Cobaltite chemical formula.

Chemical formula of Tanzanite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Cobaltite- CoAsSAnthony et al , Handbook of mineralogy (2001)

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Tanzanite and Cobaltite Specific Gravity

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