Alexandrite and Cobaltite Physical Properties

Alexandrite

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

3.69-3.816.3

1 7.18

1.5 Fracture

Not Available

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

1,1 ; 3,2.

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

1.7 Mohs Hardness

8.55.5

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

CoAsSAnthony et al , Handbook of mineralogy (2001)

Alexandrite and Cobaltite Chemical Formula

While comparing Alexandrite 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 Alexandrite and Cobaltite chemical formula.

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

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Alexandrite and Cobaltite Specific Gravity

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