Hessonite and Alexandrite Physical Properties

Hessonite

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

3.55-3.73

3.69-3.81

1.5 Fracture

Uneven

Not Available

1.6 Cleavage

Not Available

1,1 ; 3,2.

1.7 Mohs Hardness

7-7.5

8.5

1.8 Chemical Composition

Not Available

BeAl ₂ O ₄

Hessonite and Alexandrite Chemical Formula

While comparing Hessonite 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 Hessonite and Alexandrite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄

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Hessonite and Alexandrite Specific Gravity

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