Pyromorphite and Howlite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
6.5-7.1
2.45-2.58
Fracture
Uneven, ConchoidalArthur Thomas, Brittle, Metallic
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Cleavage
Imperfect- [10 1 1]
None
Mohs Hardness
3.5-4
3-3.5
Chemical Composition
Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)
Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Pyromorphite and Howlite Chemical Formula
While comparing Pyromorphite and Howlite 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 Howlite chemical formula.
- Chemical formula of Pyromorphite- Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)
- Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Pyromorphite and Howlite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Pyromorphite and Howlite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyromorphite and Howlite Optical Properties during the identification of gemstone. Specific gravity of Pyromorphite is 2.45-2.58 whereas that of Howlite is 2.45-2.58.