Andalusite and Cobaltite Physical Properties

Andalusite

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

3.05-3.21

6.3

1.5 Fracture

Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur 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

Good on {110}, poor on {100}

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

1.7 Mohs Hardness

7.5

5.5

1.8 Chemical Composition

Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

CoAsSAnthony et al , Handbook of mineralogy (2001)

Andalusite and Cobaltite Chemical Formula

While comparing Andalusite 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 Andalusite and Cobaltite chemical formula.

Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Cobaltite- CoAsSAnthony et al , Handbook of mineralogy (2001)

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Andalusite and Cobaltite Specific Gravity

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