Pyrope and Cinnabar Physical Properties
Tenacity
-
Slightly sectile
Solubility
insoluble in water
1.04 x 10−25 g per 100 ml water (Ksp at 25°C = 2 x 10−32)
Specific Gravity
3.62-3.87
2
Fracture
Conchoidal
Uneven
Cleavage
None
Prismatic {10 1 0}, perfect
Mohs Hardness
7-7.5
2-2.5
Chemical Composition
Mg 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Pyrope and Cinnabar Chemical Formula
While comparing Pyrope 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 Pyrope and Cinnabar chemical formula.
- Chemical formula of Pyrope- Mg 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
- Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Pyrope and Cinnabar Specific Gravity
Another important criteria for qualitative analysis of gemstones is Pyrope and Cinnabar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrope and Cinnabar Optical Properties during the identification of gemstone. Specific gravity of Pyrope is 2 whereas that of Cinnabar is 2.