Celestine and Alunite Physical Properties
Solubility
Not Available
Soluble
Durability
Not Available
Not Available
Specific Gravity
3.90-4.00
2.6-2.9
Fracture
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Conchoidal, Uneven
Cleavage
Perfect on {001}, good on {210}, poor on {010}
On {0001}, perfect
Mohs Hardness
3-3.5
3.5-4
Chemical Composition
SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
KAl3(SO4)2(OH)6
Celestine and Alunite Chemical Formula
While comparing Celestine and Alunite 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 Celestine and Alunite chemical formula.
- Chemical formula of Celestine- SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Alunite- KAl3(SO4)2(OH)6
Celestine and Alunite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Celestine and Alunite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Celestine and Alunite Optical Properties during the identification of gemstone. Specific gravity of Celestine is 2.6-2.9 whereas that of Alunite is 2.6-2.9.