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Start Over You searched for: Object class Mineral and rock samples Remove constraint Object class: Mineral and rock samples Collection place Contra Costa County, California Remove constraint Collection place: Contra Costa County, California Accession number Acc.299 Remove constraint Accession number: Acc.299

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1. Clay, sand, shell, and peat

2. Crystal

3. Crystal

4. Crystal

5. Rock

6. Rock

7. Rock

8. Rock

9. Rock

10. Rock