Pearl and Sillimanite Physical Properties

Pearl

Sillimanite

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1 Physical Properties

1.1 Tenacity

Not Available

Tough

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.60-2.853.20-3.26

1 7.18

1.5 Fracture

Gemstones of the world (2001), UnevenWalter Schumann, Gemstones of the world (2001)

Splintery

1.6 Cleavage

none

{010} perfect

1.7 Mohs Hardness

2.5-4.56-7.5

2 10

1.8 Chemical Composition

Not Available

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

Pearl and Sillimanite Chemical Formula

While comparing Pearl 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 Pearl and Sillimanite chemical formula.

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

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Pearl Vs Prase

Pearl and Sillimanite Specific Gravity

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