| #1454 Tsumcorite | | lemon-yellow, micro xls on quartz (Thumb Nail) | | Richmond Sitting Bull Mine, Galena, Lawrence County, South Dakota, USA | | 2000 | | Fantastic micro xl piece. Collected in 1987 but rediscovered in 2000. The specimen was collected in the area where pharmacosiderite had been mined by Black Hills Institute in mid 1980s. |
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