Cinnabar and Amethyst Physical Properties
Tenacity
Slightly sectile
Not Available
Solubility
1.04 x 10−25 g per 100 ml water (Ksp at 25°C = 2 x 10−32)
insoluble in common solvents
Durability
Not Available
Not Available
Fracture
Uneven, Uneven, Gemstones (2009), Brittle
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
Cleavage
Prismatic {10 1 0}, perfect
Indiscernible
Chemical Composition
HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
SiO2
Cinnabar and Amethyst Chemical Formula
While comparing Cinnabar and Amethyst 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 Amethyst chemical formula.
- Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Amethyst- SiO2
Cinnabar and Amethyst Specific Gravity
Another important criteria for qualitative analysis of gemstones is Cinnabar and Amethyst Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cinnabar and Amethyst Optical Properties during the identification of gemstone. Specific gravity of Cinnabar is 2.65 whereas that of Amethyst is 2.65.