The Bitter Creek mine is the type locality for montroseite (Weeks and others, 1950, 1953). The microscopic, bladed prismatic crystals and compact crystalline aggregates of montroseite were also noted by Heyl (1957).
Quality of samples:
not specified / average specimens
"Mmer,Min.(1951) 36, 326-327 (abstract); Minerals of Colorado, updated & revised", p. 336, by Eckel, Edwin B., 1997; USGS Bull 1042F