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Production place
- NV-Ch-35 (Humboldt Cave), Churchill County, Nevada28 objects
- Luzon Island, Luzon island group, Philippines20 objects
- Bolivian Chaco, Bolivia13 objects
- CA-Sha-20, Shasta County, California3 objects
- Stone Lagoon, Humboldt County, California3 objects
- CA-Fre-67, Fresno County, California2 objects
- Freshwater Lagoon, Humboldt lagoons, Humboldt County2 objects
- CA-CCo-138, Oakley, Contra Costa County1 objects
- CA-Mrn-232 (Estero Mound), Drakes Bay, Marin County1 objects
- CA-Sha-21, Shasta County, California1 objects
- NV-Ch-18 (Lovelock Cave), Churchill County, Nevada1 objects
- NV-Wh-2 (Smith Creek Cave), White Pine County, Nevada1 objects
- Redwood Lagoon, Humboldt County, California1 objects
- San Francisco, San Francisco County, California1 objects