Rhodochrosite and Sillimanite Physical Properties

Rhodochrosite

Sillimanite

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1 Physical Properties

1.1 Tenacity

Brittle

Tough

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.0-3.33.20-3.26

1 7.18

1.5 Fracture

Uneven, Conchoidal, Conchoidal to uneven, Brittle

Splintery

1.6 Cleavage

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

{010} perfect

1.7 Mohs Hardness

3.5-46-7.5

2 10

1.8 Chemical Composition

MnCO₃

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

Rhodochrosite and Sillimanite Chemical Formula

While comparing Rhodochrosite 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 Rhodochrosite and Sillimanite chemical formula.

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

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Rhodochrosite and Sillimanite Specific Gravity

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