Alunite and Pearl Physical Properties

Alunite

Pearl

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.92.60-2.85

1 7.18

1.5 Fracture

Conchoidal, Uneven

Gemstones of the world (2001), UnevenWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

On {0001}, perfect

none

1.7 Mohs Hardness

3.5-42.5-4.5

2 10

1.8 Chemical Composition

KAl3(SO4)2(OH)6

Not Available

Alunite and Pearl Chemical Formula

While comparing Alunite and Pearl 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 Pearl chemical formula.

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

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Alunite and Pearl Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alunite and Pearl Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Pearl Optical Properties during the identification of gemstone. Specific gravity of Alunite is 2.60-2.85 whereas that of Pearl is 2.60-2.85.