Pyromorphite
Image: Robert M. Lavinsky (CC BY-SA 3.0)
Mineral NamePyromorphite
Chemical FormulaPb₅(PO₄)₃Cl
Mohs Hardness3.5
Crystal Systemhexagonal
Lusterresinous
Streak Colorwhite to yellowish-white
Cleavageimperfect on {1010}
Fractureconchoidal to uneven
Specific Gravity6.5
Colorsgreen, yellow, orange, brown, white
Transparencytranslucent
Type LocalityGuilin Prefecture, Guangxi Zhuang Autonomous Region, China
Mineral GroupPhosphates
Usescollector, minor lead ore
Associated Mineralsgalena, cerussite, anglesite, mimetite, vanadinite, quartz
Rarityuncommon
Description
This specimen showcases vibrant, apple-green pyromorphite crystals forming botryoidal to radiating aggregates on a dark, earthy matrix. The crystals exhibit a resinous luster and create a striking, spiky texture.
Geological Context
Pyromorphite is a secondary mineral found in the oxidized zone of lead ore deposits, typically forming from the alteration of primary lead minerals like galena. It often occurs in veins and cavities within lead-rich rocks.
