Pyromorphite and Gahnite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
6.5-7.1
4.00-4.62
Fracture
Uneven, ConchoidalArthur Thomas, Brittle, Metallic
Conchoidal, Uneven
Cleavage
Imperfect- [10 1 1]
Indistinct parting on [111]
Mohs Hardness
3.5-4
7.5-8
Chemical Composition
Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Pyromorphite and Gahnite Chemical Formula
While comparing Pyromorphite and Gahnite 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 Pyromorphite and Gahnite chemical formula.
- Chemical formula of Pyromorphite- Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)
- Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Pyromorphite and Gahnite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Pyromorphite and Gahnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyromorphite and Gahnite Optical Properties during the identification of gemstone. Specific gravity of Pyromorphite is 4.00-4.62 whereas that of Gahnite is 4.00-4.62.