Alexandrite and Beryllonite Physical Properties

Alexandrite

Beryllonite

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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

3.69-3.812.79-2.87

1 7.18

1.5 Fracture

Not Available

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal

1.6 Cleavage

1,1 ; 3,2.

{010} perfect; {100} good, interrupted; {101} indistinct; {001} in traces

1.7 Mohs Hardness

8.55.5-6

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Alexandrite and Beryllonite Chemical Formula

While comparing Alexandrite and Beryllonite 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 Beryllonite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Beryllonite- NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Alexandrite and Beryllonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Beryllonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Beryllonite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 2.79-2.87 whereas that of Beryllonite is 2.79-2.87.