Gibbsite and Powellite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.35
4.23
Fracture
Fibrous, Difficult, Fibrous
UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Cleavage
{001} Perfect
{111} Distinct
Mohs Hardness
2.5-3
3.5-4
Chemical Composition
Al(OH)3
CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Gibbsite and Powellite Chemical Formula
While comparing Gibbsite and Powellite 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 Gibbsite and Powellite chemical formula.
- Chemical formula of Gibbsite- Al(OH)3
- Chemical formula of Powellite- CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Gibbsite and Powellite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Gibbsite and Powellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gibbsite and Powellite Optical Properties during the identification of gemstone. Specific gravity of Gibbsite is 4.23 whereas that of Powellite is 4.23.