Alunite and Rhodochrosite Physical Properties

Alunite

Rhodochrosite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.93.0-3.3

1 7.18

1.5 Fracture

Conchoidal, Uneven

Uneven, Conchoidal, Conchoidal to uneven, Brittle

1.6 Cleavage

On {0001}, perfect

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

1.7 Mohs Hardness

3.5-43.5-4

2 10

1.8 Chemical Composition

KAl3(SO4)2(OH)6

MnCO₃

Alunite and Rhodochrosite Chemical Formula

While comparing Alunite 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 Alunite and Rhodochrosite chemical formula.

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

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Alunite and Rhodochrosite Specific Gravity

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