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