Pyrolusite - image 1

Pyrolusite

P

Peter Giangrande
0 for sale
Pyrolusite crystals, 12cm, from the Maroco mine, Cuyuna Range. Peter Giangrande specimen, ex-Joe Heininger collection; Jeff Krueger photo.

Product details

Species
PyrolusiteAbout Pyrolusite →
Added on02/13/2026
Locality
USA, Minnesota, Maroco Mine
Publications
  • Mineralogical Record 56 4 page 117

Known provenance

DateCollectorAcquisition price
—Joe HeiningerNot disclosed

Learn more

Mineral guide
Learn about Pyrolusite
jet-black crystals and dramatic pseudomorphs with steel luster; prized display pieces from storied Mn deposits, Ilfeld and the Kalahari Field.
Regional guide
Pyrolusite from Maroco Mine
Sign in to contribute