WGNHS
Wisconsin Geological and Natural History Survey

Plumbogummite

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

Description:

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).