Peridot and Cinnabar Physical Properties

Peridot

Cinnabar

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1 Physical Properties

1.1 Tenacity

Not Available

Slightly sectile

1.2 Solubility

Not Available

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

1.3 Durability

Not Available

1.4 Specific Gravity

1.54-1.552

1 7.18

1.5 Fracture

Conchoidal

Uneven, Uneven, Gemstones (2009), Brittle

1.6 Cleavage

Poor

Prismatic {10 1 0}, perfect

1.7 Mohs Hardness

6.5-72-2.5

2 10

1.8 Chemical Composition

(Mg,Fe)₂SiO₄

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

Peridot and Cinnabar Chemical Formula

While comparing Peridot 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 Peridot and Cinnabar chemical formula.

Chemical formula of Peridot- (Mg,Fe)₂SiO₄
Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Peridot and Cinnabar Specific Gravity

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