Emerald and Sillimanite Physical Properties

Emerald

Sillimanite

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1 Physical Properties

1.1 Tenacity

Not Available

Tough

1.2 Solubility

Not Available

1.3 Durability

Hard

Not Available

1.4 Specific Gravity

2.67-2.783.20-3.26

1 7.18

1.5 Fracture

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

Splintery

1.6 Cleavage

Imperfect on the [0001]

{010} perfect

1.7 Mohs Hardness

7.5-86-7.5

2 10

1.8 Chemical Composition

Be₃Al₂SiO₆

Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Emerald and Sillimanite Chemical Formula

While comparing Emerald and Sillimanite 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 Sillimanite chemical formula.

Chemical formula of Emerald- Be₃Al₂SiO₆
Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

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Emerald and Sillimanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Emerald and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Emerald and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Emerald is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.