Cobaltite and Alexandrite Physical Properties

Cobaltite

Alexandrite

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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

6.33.69-3.81

1 7.18

1.5 Fracture

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

Not Available

1.6 Cleavage

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

1,1 ; 3,2.

1.7 Mohs Hardness

5.58.5

2 10

1.8 Chemical Composition

CoAsSAnthony et al , Handbook of mineralogy (2001)

BeAl ₂ O ₄

Cobaltite and Alexandrite Chemical Formula

While comparing Cobaltite and Alexandrite 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 Cobaltite and Alexandrite chemical formula.

Chemical formula of Cobaltite- CoAsSAnthony et al , Handbook of mineralogy (2001)
Chemical formula of Alexandrite- BeAl ₂ O ₄

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Cobaltite and Alexandrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cobaltite and Alexandrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cobaltite and Alexandrite Optical Properties during the identification of gemstone. Specific gravity of Cobaltite is 3.69-3.81 whereas that of Alexandrite is 3.69-3.81.