John Betts - Fine Minerals
Double-sided specimen coated front and rear with rhombohedral brown Siderite crystals with iridescent sheen on the surfaces. One side has botryoidal aggregates of microcrystals, the opposite side has larger crystals to 0.5 mm. The crystals grew in a constricted vein preventing complete crystal development.
Bisbee, Cochise County, Arizona.