Alexandrite and Plumbogummite Physical Properties

Alexandrite

Plumbogummite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.69-3.81

4.014

1.5 Fracture

Not Available

Uneven, Conchoidal

1.6 Cleavage

1,1 ; 3,2.

None

1.7 Mohs Hardness

8.5

4-5

1.8 Chemical Composition

BeAl ₂ O ₄

Not Available

Alexandrite and Plumbogummite Chemical Formula

While comparing Alexandrite and Plumbogummite 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 Plumbogummite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄

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Alexandrite and Plumbogummite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Plumbogummite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Plumbogummite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 4.014 whereas that of Plumbogummite is 4.014.