Cavities in an oxidized hydrothermal Au�Te deposit in intensely silicified brecciated rhyolite vitrophyre.
IMA Status:
Approved IMA 1975
Locality:
Oriental (Bambollita) mine, northeast of the Moctezuma (Bambolla) mine, 12 km south of Moctezuma, Sonora, Mexico. Link to MinDat.org Location Data.
Name Origin:
Named for Carl Fries, Jr. (1910-1965), U.S. Geological Survey and the Geological Institute of the National University, Mexico City, Mexico