Rhodochrosite and Alunite Physical Properties

Rhodochrosite

Alunite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.0-3.32.6-2.9

1 7.18

1.5 Fracture

Uneven, Conchoidal, Conchoidal to uneven, Brittle

Conchoidal, Uneven

1.6 Cleavage

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

On {0001}, perfect

1.7 Mohs Hardness

3.5-43.5-4

2 10

1.8 Chemical Composition

MnCO₃

KAl3(SO4)2(OH)6

Rhodochrosite and Alunite Chemical Formula

While comparing Rhodochrosite and Alunite 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 Alunite chemical formula.

Chemical formula of Rhodochrosite- MnCO₃
Chemical formula of Alunite- KAl3(SO4)2(OH)6

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Rhodochrosite and Alunite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Rhodochrosite and Alunite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rhodochrosite and Alunite Optical Properties during the identification of gemstone. Specific gravity of Rhodochrosite is 2.6-2.9 whereas that of Alunite is 2.6-2.9.