Pollucite and Andradite Physical Properties
Solubility
Readily soluble in HF
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.86-2.94
3.70-4.10
Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
None observed
none
Mohs Hardness
6.5-7
6.5-7
Chemical Composition
(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Pollucite and Andradite Chemical Formula
While comparing Pollucite and Andradite 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 Pollucite and Andradite chemical formula.
- Chemical formula of Pollucite- (Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
- Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Pollucite and Andradite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Pollucite and Andradite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pollucite and Andradite Optical Properties during the identification of gemstone. Specific gravity of Pollucite is 3.70-4.10 whereas that of Andradite is 3.70-4.10.