Cinnabar and Gibbsite Physical Properties

Cinnabar

Gibbsite

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1 Physical Properties

1.1 Tenacity

Slightly sectile

Not Available

1.2 Solubility

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

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

22.35

1 7.18

1.5 Fracture

Uneven, Uneven, Gemstones (2009), Brittle

Fibrous, Difficult, Fibrous

1.6 Cleavage

Prismatic {10 1 0}, perfect

{001} Perfect

1.7 Mohs Hardness

2-2.52.5-3

2 10

1.8 Chemical Composition

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

Al(OH)3

Cinnabar and Gibbsite Chemical Formula

While comparing Cinnabar and Gibbsite 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 Gibbsite chemical formula.

Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Gibbsite- Al(OH)3

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Cinnabar and Gibbsite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cinnabar and Gibbsite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cinnabar and Gibbsite Optical Properties during the identification of gemstone. Specific gravity of Cinnabar is 2.35 whereas that of Gibbsite is 2.35.