Alexandrite and Halite Physical Properties

Alexandrite

Halite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Water-soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.69-3.81

2.17

1.5 Fracture

Not Available

Conchoidal, Brittle, Metallic

1.6 Cleavage

1,1 ; 3,2.

Perfect {001}, three directions cubic

1.7 Mohs Hardness

8.5

2.0-2.5

1.8 Chemical Composition

BeAl ₂ O ₄

NaCl

Alexandrite and Halite Chemical Formula

While comparing Alexandrite and Halite 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 Halite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Halite- NaCl

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Alexandrite and Halite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Halite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Halite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 2.17 whereas that of Halite is 2.17.