Pyromorphite and Howlite Physical Properties

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 O’Donoghue , 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.