Rhodochrosite and Corundum Physical Properties

Rhodochrosite

Corundum

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.0-3.3

3.90-4.05

1.5 Fracture

Uneven, Conchoidal, Conchoidal to uneven, Brittle

Uneven, Uneven, Gems, Difficult, Fibrous

1.6 Cleavage

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

None – parting in 3 directions

1.7 Mohs Hardness

3.5-4

1.8 Chemical Composition

MnCO₃

Al 2O 3Arthur Thomas , Gemstones (2009)

Rhodochrosite and Corundum Chemical Formula

While comparing Rhodochrosite and Corundum 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 Corundum chemical formula.

Chemical formula of Rhodochrosite- MnCO₃
Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)

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Rhodochrosite and Corundum Specific Gravity

Another important criteria for qualitative analysis of gemstones is Rhodochrosite and Corundum Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rhodochrosite and Corundum Optical Properties during the identification of gemstone. Specific gravity of Rhodochrosite is 3.90-4.05 whereas that of Corundum is 3.90-4.05.