- Phosphosiderite, Barbosalite
- Bull Moose Mine, Custer, Custer District, Custer Co., South Dakota, USA
- Miniature, 5.0 x 4.0 x 3.5 cm
Sharp, gemmy, transparent crystals of the rare species phosphosiderite, to 1 mm or so, perched on 3-dimensional dark phosphate matrix with black microcrystals of barbosalite. From old finds here (ex. Dr. David Garske) .