Petalite and Magnesite Physical Properties
Solubility
insoluble
Effervesces in hot HCl
Durability
Not Available
Not Available
Specific Gravity
2.40
2.92-3.12
Fracture
Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Cleavage
Perfect on {001}, poor on {201} with 38.5° angle between the two
[10 1 1] perfect
Mohs Hardness
6-6.5
3.5-4.5
Chemical Composition
LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
MgCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Petalite and Magnesite Chemical Formula
While comparing Petalite and Magnesite 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 Petalite and Magnesite chemical formula.
- Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Magnesite- MgCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Petalite and Magnesite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Petalite and Magnesite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Petalite and Magnesite Optical Properties during the identification of gemstone. Specific gravity of Petalite is 2.92-3.12 whereas that of Magnesite is 2.92-3.12.