Cinnabar and Alunite Physical Properties

Cinnabar

Alunite

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1 Physical Properties

1.1 Tenacity

Slightly sectile

Brittle

1.2 Solubility

1.04 x 10⁻²⁵ g per 100 ml water (Ksp at 25°C = 2 x 10⁻³²)

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

22.6-2.9

1 7.18

1.5 Fracture

Uneven, Uneven, Gemstones (2009), Brittle

Conchoidal, Uneven

1.6 Cleavage

Prismatic {10 1 0}, perfect

On {0001}, perfect

1.7 Mohs Hardness

2-2.53.5-4

2 10

1.8 Chemical Composition

HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

KAl3(SO4)2(OH)6

Cinnabar and Alunite Chemical Formula

While comparing Cinnabar 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 Cinnabar and Alunite chemical formula.

Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Alunite- KAl3(SO4)2(OH)6

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Cinnabar and Alunite Specific Gravity

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