Cinnabar and Iddingsite Physical Properties

Cinnabar

Iddingsite

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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

22.5-2.8

1 7.18

1.5 Fracture

Uneven, Uneven, Gemstones (2009), Brittle

Not Available

1.6 Cleavage

Prismatic {10 1 0}, perfect

{???} Perfect

1.7 Mohs Hardness

2-2.53

2 10

1.8 Chemical Composition

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

MgO.Fe2O3.3SiO2•4(H2O)

Cinnabar and Iddingsite Chemical Formula

While comparing Cinnabar and Iddingsite 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 Iddingsite chemical formula.

Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Iddingsite- MgO.Fe2O3.3SiO2•4(H2O)

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Cinnabar and Iddingsite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cinnabar and Iddingsite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cinnabar and Iddingsite Optical Properties during the identification of gemstone. Specific gravity of Cinnabar is 2.5-2.8 whereas that of Iddingsite is 2.5-2.8.