Alexandrite and Edenite Physical Properties

Alexandrite

Edenite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.69-3.81

3.05-3.37

1.5 Fracture

Not Available

Conchoidal, Brittle, Conchoidal

1.6 Cleavage

1,1 ; 3,2.

Good on (110)

1.7 Mohs Hardness

8.5

5-6

1.8 Chemical Composition

BeAl ₂ O ₄

NaCa2Mg5Si7AlO22(OH)2

Alexandrite and Edenite Chemical Formula

While comparing Alexandrite and Edenite 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 Edenite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Edenite- NaCa2Mg5Si7AlO22(OH)2

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Alexandrite and Edenite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Edenite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Edenite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 3.05-3.37 whereas that of Edenite is 3.05-3.37.