Precious Opal and Cinnabar Physical Properties

Precious Opal

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

1.98-2.252

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references

Uneven, Uneven, Gemstones (2009), Brittle

1.6 Cleavage

Not Available

Prismatic {10 1 0}, perfect

1.7 Mohs Hardness

5-6.52-2.5

2 10

1.8 Chemical Composition

SiO 2 · nH 2OGemdat.org , Management Team (2012)

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

Precious Opal and Cinnabar Chemical Formula

While comparing Precious Opal 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 Precious Opal and Cinnabar chemical formula.

Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Blue Gemstones

Precious Opal Vs Sapphire

Precious Opal Vs Sardonyx

Precious Opal Vs Sard

Precious Opal and Cinnabar Specific Gravity

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