2020-10-072022-02-032020-10-072022-02-03https://hdl.handle.net/11124/175269Caption reads: "12."Donor: Friends of Mineralogy, Colorado Chapter.Iron Mask mine buildings (?) above Iron Mask Gulch, with tailings down the mountainside.4 1/2 x 3 1/2 inchesblack-and-white photographsMine dumpsMine buildings -- ColoradoZinc mines and mining -- ColoradoSilver mines and mining -- ColoradoStillImage