Alunite and Charoite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Soluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.6-2.9
2.54-2.78
Fracture
Conchoidal, Uneven
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
On {0001}, perfect
Good in three directions
Chemical Composition
KAl3(SO4)2(OH)6
K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Alunite and Charoite Chemical Formula
While comparing Alunite and Charoite 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 Alunite and Charoite chemical formula.
- Chemical formula of Alunite- KAl3(SO4)2(OH)6
- Chemical formula of Charoite- K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Alunite and Charoite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Alunite and Charoite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Charoite Optical Properties during the identification of gemstone. Specific gravity of Alunite is 2.54-2.78 whereas that of Charoite is 2.54-2.78.