Onyx and Cinnabar Physical Properties

Onyx

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

2.55-2.702

1 7.18

1.5 Fracture

Not Available

Uneven, Uneven, Gemstones (2009), Brittle

1.6 Cleavage

Indiscernible

Prismatic {10 1 0}, perfect

1.7 Mohs Hardness

6.5-72-2.5

2 10

1.8 Chemical Composition

SiO₂

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

Onyx and Cinnabar Chemical Formula

While comparing Onyx 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 Onyx and Cinnabar chemical formula.

Chemical formula of Onyx- SiO₂
Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Onyx and Cinnabar Specific Gravity

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