Clear plumbogummite crystal on green pyromorphite. From the Blue Bell Mine, Baker, San Bernardino County, California. Field of view is about 0.5 mm. (Photo courtesy Brent Thorne; unauthorized reproduction is prohibited.)

Formula: PbAl3(PO4)2(OH)5.H2O Hexagonal


Plumbogummite is a rare secondary mineral found in the oxidized zone over lead-bearing deposits.

RUSK COUNTY: Plumbogummite occurs in the oxidized zone at the Flambeau Mine, near Ladysmith (Jones, Jones, and LaBerge, 1999).

WOOD COUNTY: Plumbogummite was found as tiny grains intergrown with sulfides in a greisen zone in the Magurie Pit, part of the LaDick East quarry complex east of Wausau (Buchholz et al. , 2005a).