Collection place
- Central California10 objects
- Central Mexico6 objects
- Central Oregon4 objects
- Chichén Itzá, Yucatán, Mexico2 objects
- China3 objects
- Chincha Islands, Peru4 objects
- Chinle, Apache County, Arizona2 objects
- Clear Lake, Lake County, California4 objects
- Coastal Peru8 objects
- Concrete, Skagit County, Washington5 objects
- Deer Creek, Tehama County, California4 objects
- Del Norte County, California5 objects
- Delhi State, India5 objects
- Department of Ica, Southern Peru2 objects
- East Asia3 objects
- Eastern California4 objects
- Eastern Oregon1 objects
- Egypt24 objects
- Elk Valley, Del Norte County, California2 objects
- Fayette County, West Virginia33 objects