Achroite and Cinnabar Physical Properties
Tenacity
Not Available
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
2.90-3.40
2
Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Uneven, Uneven, Gemstones (2009), Brittle
Cleavage
Not Available
Prismatic {10 1 0}, perfect
Mohs Hardness
7-7.5
2-2.5
Chemical Composition
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Achroite and Cinnabar Chemical Formula
While comparing Achroite 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 Achroite and Cinnabar chemical formula.
- Chemical formula of Achroite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
- Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Achroite and Cinnabar Specific Gravity
Another important criteria for qualitative analysis of gemstones is Achroite and Cinnabar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Achroite and Cinnabar Optical Properties during the identification of gemstone. Specific gravity of Achroite is 2 whereas that of Cinnabar is 2.