Petalite and Marialite Physical Properties
Solubility
insoluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.40
2.50
Fracture
Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Cleavage
Perfect on {001}, poor on {201} with 38.5° angle between the two
Distinct on {100} and {110}
Mohs Hardness
6-6.5
5.5-6
Chemical Composition
LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
3NaAlSi 3O 8 · NaClAnthony et al , Handbook of mineralogy (2001)
Petalite and Marialite Chemical Formula
While comparing Petalite and Marialite 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 Marialite chemical formula.
- Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Marialite- 3NaAlSi 3O 8 · NaClAnthony et al , Handbook of mineralogy (2001)
Petalite and Marialite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Petalite and Marialite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Petalite and Marialite Optical Properties during the identification of gemstone. Specific gravity of Petalite is 2.50 whereas that of Marialite is 2.50.