Pyromorphite

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Pyromorphite is a member of the apatite family of minerals. Faceted stones are very rare and its colors are usually brown, green, orange, yellow, colorless, gray and white. Pyromorphite was named in 1813 from the Greek words for "fire" and "form" because, after being melted, the mineral will take on a crystalline shape upon cooling.

Pyromorphite Polished
Pyromorphite Classification
Common Name Pyromorphite
Species Pyromorphite
Pyromorphite Optical Properties
Transparency Transparent - Translucent
Dispersion Strength: Strong Fire
Refractive Index Over The Limit 2.042-2.059
Birefringence 0.01
Optic Character Uniaxial
Optic Sign Negative
Polariscope Reaction Aggregate (AGG), Doubly Refractive (DR)
Pleochroism Unobservable
Pyromorphite Characteristic Physical Properties
Hardness 3.5-4
Streak White
Specific Gravity 6.500-7.100
Toughness Poor
Luster Vitreous, Resinous
Fracture Subconchoidal
Cleavage Poor, in one direction
Pyromorphite Chemistry & Crystallography
Chemical Name lead chlorophosphate
Chemical Formula Pb5(PO4)3Cl
Crystal System Hexagonal
Chemistry Classification Phosphate

Pyromorphite Colors

  • Green Pyromorphite Green

Countries of Origin

Canada; United States of America (the); China; Mexico

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Tim Matthews

Author

Tim Matthews

Tim Matthews is President and Chief Executive Officer of Jewelry Television® (JTV), as well as a member of the company's Board of Directors. He oversees and leads all aspects of the company's powerful omni-digital retail platform that uniquely specializes in fine jewelry and gemstones. His passion for business and gemstones has led him to become a recognized expert in the field of gemology. He is a life member of the Gemmological Association of Great Britain (Gem-A) and has earned Gem-A's highest degrees, the Gemmology (FGA) and Diamond (DGA) diplomas. He is also a Graduate Gemologist (GG) of the Gemological Institute of America (GIA) and has also completed GIA's Graduate Diplomas in Diamonds, Colored Stones and Pearls. Under his leadership, JTV has become the leader in the sourcing and selling of color gemstones and jewelry.

This page was created on June 27, 2014.

This page was last edited on October 24, 2019.