Pollucite and Diaspore Physical Properties
Tenacity
Brittle
Very brittle
Solubility
Readily soluble in HF
insoluble
Durability
Not Available
Not Available
Specific Gravity
2.86-2.94
3.30-3.40
Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Conchoidal, Brittle, Conchoidal
Cleavage
None observed
{010} perfect, {110} distinct, {100} in traces
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
AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Pollucite and Diaspore Chemical Formula
While comparing Pollucite and Diaspore 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 Diaspore 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 Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Pollucite and Diaspore Specific Gravity
Another important criteria for qualitative analysis of gemstones is Pollucite and Diaspore Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pollucite and Diaspore Optical Properties during the identification of gemstone. Specific gravity of Pollucite is 3.30-3.40 whereas that of Diaspore is 3.30-3.40.