Rhodolite and Alunite Physical Properties

Rhodolite

Alunite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.842.6-2.9

1 7.18

1.5 Fracture

Conchoidal

Conchoidal, Uneven

1.6 Cleavage

none, may show indistinct parting

On {0001}, perfect

1.7 Mohs Hardness

7-7.53.5-4

2 10

1.8 Chemical Composition

(Mg,Fe)₃Al₂Si₃O₁₂

KAl3(SO4)2(OH)6

Rhodolite and Alunite Chemical Formula

While comparing Rhodolite 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 Rhodolite and Alunite chemical formula.

Chemical formula of Rhodolite- (Mg,Fe)₃Al₂Si₃O₁₂
Chemical formula of Alunite- KAl3(SO4)2(OH)6

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Rhodolite and Alunite Specific Gravity

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