Iddingsite and Cinnabar Physical Properties

Iddingsite

Cinnabar

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Physical Properties

Tenacity

Slightly sectile

Solubility

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

Durability

Specific Gravity

2.5-2.82

1 7.18

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Fracture

Uneven

Cleavage

{???} Perfect

Prismatic {10 1 0}, perfect

Mohs Hardness

32-2.5

2 10

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Chemical Composition

MgO.Fe2O3.3SiO2•4(H2O)

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

Iddingsite and Cinnabar Chemical Formula

While comparing Iddingsite and Cinnabar 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 Iddingsite and Cinnabar chemical formula.

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

Compare Brown Gemstones

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Iddingsite Vs Kutnohorite

Iddingsite Vs Radiolarite

Iddingsite and Cinnabar Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iddingsite and Cinnabar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iddingsite and Cinnabar Optical Properties during the identification of gemstone. Specific gravity of Iddingsite is 2 whereas that of Cinnabar is 2.