Alexandrite and Sugilite Physical Properties

Alexandrite

Sugilite

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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

3.69-3.812.69-2.79

1 7.18

1.5 Fracture

Not Available

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

1,1 ; 3,2.

Poor on {0001}

1.7 Mohs Hardness

8.55.5-6.5

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Alexandrite and Sugilite Chemical Formula

While comparing Alexandrite and Sugilite 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 Sugilite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Sugilite- KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Alexandrite and Sugilite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Sugilite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Sugilite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 2.69-2.79 whereas that of Sugilite is 2.69-2.79.