| IGSN | Sample Type | Notes | Location | Number Thin Sections | Storage Location |
|---|---|---|---|---|---|
| GRD00K1S0 | Anhydrite | Massive anhydrite, Paradox Evaporite member of Hermosa formation. | Utah, New Mexico, Colorado areas | 0 | Ritter 154, 17 M |
| GRD00PNS0 | Anhydrite | evaporite deposits | California | 1 | Ritter 154, 17 M |
| GRD00XXS0 | Anhydrite | evaporite deposits, chickenwire fabric. | California | 1 | Ritter 154, 17 M |