Alexandrite and Pleonaste Physical Properties

Alexandrite

Pleonaste

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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

3.69-3.813.80

1 7.18

1.5 Fracture

Not Available

1.6 Cleavage

1,1 ; 3,2.

Not Available

1.7 Mohs Hardness

8.58

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

(Mg,Fe)Al 2O 4Gemdat.org , Management Team (2012)

Alexandrite and Pleonaste Chemical Formula

While comparing Alexandrite and Pleonaste 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 Pleonaste chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Pleonaste- (Mg,Fe)Al 2O 4Gemdat.org , Management Team (2012)

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Alexandrite and Pleonaste Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Pleonaste Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Pleonaste Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 3.80 whereas that of Pleonaste is 3.80.