Sillimanite and Cinnabar Physical Properties
Tenacity
Tough
Slightly sectile
Solubility
Not Available
1.04 x 10−25 g per 100 ml water (Ksp at 25°C = 2 x 10−32)
Durability
Not Available
Not Available
Specific Gravity
3.20-3.26
2
Fracture
Splintery
Uneven, Uneven, Gemstones (2009), Brittle
Cleavage
{010} perfect
Prismatic {10 1 0}, perfect
Mohs Hardness
6-7.5
2-2.5
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Sillimanite and Cinnabar Chemical Formula
While comparing Sillimanite 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 Sillimanite and Cinnabar chemical formula.
- Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Sillimanite and Cinnabar Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sillimanite and Cinnabar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Cinnabar Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 2 whereas that of Cinnabar is 2.