| IGSN | Sample Type | Notes | Location | Number Thin Sections | Storage Location |
|---|---|---|---|---|---|
| GRD039AS0 | Psilomelane | Psilomelane replacing Manganite | Arizona | 0 | Ritter 154, 12 B |
| GRD039DS0 | Psilomelane | Psilomelane | Unknown | 0 | Ritter 154, 12 B |
| GRD039JS0 | Psilomelane | Pyrolucite with Psilomelane | Brazil | 0 | Ritter 154, 12 B |
| GRD03MXS0 | Psilomelane | Germany | 0 | Vaughan 146, 41 D |