Cinnabar and Opal Physical Properties
Tenacity
Slightly sectile
BrittleWalter Schumann
Solubility
1.04 x 10−25 g per 100 ml water (Ksp at 25°C = 2 x 10−32)
hot salt water
Durability
Not Available
Not Available
Specific Gravity
2
1.98-2.25
Fracture
Uneven, Uneven, Gemstones (2009), Brittle
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
Cleavage
Prismatic {10 1 0}, perfect
None
Mohs Hardness
2-2.5
5-6.5
Chemical Composition
HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
SiO2 · nH2O
Cinnabar and Opal Chemical Formula
While comparing Cinnabar and Opal 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 Opal chemical formula.
- Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Opal- SiO2 · nH2O
Cinnabar and Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Cinnabar and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cinnabar and Opal Optical Properties during the identification of gemstone. Specific gravity of Cinnabar is 1.98-2.25 whereas that of Opal is 1.98-2.25.