Sillimanite and Rhodochrosite Physical Properties

Sillimanite

Rhodochrosite

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1 Physical Properties

1.1 Tenacity

Tough

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.20-3.26

3.0-3.3

1.5 Fracture

Splintery

Uneven, Conchoidal, Conchoidal to uneven, Brittle

1.6 Cleavage

{010} perfect

On {10 1 1} perfect; parting on {10 1 2}

1.7 Mohs Hardness

6-7.5

3.5-4

1.8 Chemical Composition

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

MnCO₃

Sillimanite and Rhodochrosite Chemical Formula

While comparing Sillimanite and Rhodochrosite 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 Sillimanite and Rhodochrosite chemical formula.

Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Rhodochrosite- MnCO₃

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Sillimanite and Rhodochrosite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Rhodochrosite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Rhodochrosite Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 3.0-3.3 whereas that of Rhodochrosite is 3.0-3.3.