Rosasite and Sillimanite Physical Properties

Rosasite

Sillimanite

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1 Physical Properties

1.1 Tenacity

Brittle

Tough

1.2 Solubility

Effervesces in cold

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4-4.23.20-3.26

1 7.18

1.5 Fracture

Splintery

1.6 Cleavage

Perfect on {100} and {010}

{010} perfect

1.7 Mohs Hardness

46-7.5

2 10

1.8 Chemical Composition

Not Available

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

Rosasite and Sillimanite Chemical Formula

While comparing Rosasite 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 Rosasite and Sillimanite chemical formula.

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

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Rosasite and Sillimanite Specific Gravity

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