Emerald and Sugilite Physical Properties

Emerald

Sugilite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Hard

Not Available

1.4 Specific Gravity

2.67-2.78

2.69-2.79

1.5 Fracture

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)

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

1.6 Cleavage

Imperfect on the [0001]

Poor on {0001}

1.7 Mohs Hardness

7.5-8

5.5-6.5

1.8 Chemical Composition

Be₃Al₂SiO₆

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

Emerald and Sugilite Chemical Formula

While comparing Emerald 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 Emerald and Sugilite chemical formula.

Chemical formula of Emerald- Be₃Al₂SiO₆
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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Emerald and Sugilite Specific Gravity

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