Alexandrite and Kunzite Physical Properties

Alexandrite

Kunzite

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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

3.69-3.81

3.15-3.21

1.5 Fracture

Not Available

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

1.6 Cleavage

1,1 ; 3,2.

1,2 prismatic

1.7 Mohs Hardness

8.5

6-7

1.8 Chemical Composition

BeAl ₂ O ₄

LiAlSi₂O₆

Alexandrite and Kunzite Chemical Formula

While comparing Alexandrite and Kunzite 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 Kunzite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Kunzite- LiAlSi₂O₆

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Alexandrite and Kunzite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Kunzite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Kunzite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 3.15-3.21 whereas that of Kunzite is 3.15-3.21.