Petalite and Cinnabar Physical Properties
Tenacity
Brittle
Slightly sectile
Solubility
insoluble
1.04 x 10−25 g per 100 ml water (Ksp at 25°C = 2 x 10−32)
Durability
Not Available
Not Available
Fracture
Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal
Uneven, Uneven, Gemstones (2009), Brittle
Cleavage
Perfect on {001}, poor on {201} with 38.5° angle between the two
Prismatic {10 1 0}, perfect
Mohs Hardness
6-6.5
2-2.5
Chemical Composition
LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Petalite and Cinnabar Chemical Formula
While comparing Petalite 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 Petalite and Cinnabar chemical formula.
- Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Petalite and Cinnabar Specific Gravity
Another important criteria for qualitative analysis of gemstones is Petalite and Cinnabar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Petalite and Cinnabar Optical Properties during the identification of gemstone. Specific gravity of Petalite is 2 whereas that of Cinnabar is 2.