4" Adena, Mercer Co., Iowa
Updated August 30, 2026
| Lot number | 100 |
| Estimate | $15 - $10,000 |
| Opening bid | $10 |
| Auction | Native American & Pre-Columbian Artifact Auction |
| Date | September 20, 2026 at 9:00 AM CDT |
| Auction house | Heartland Artifact Auctions Inc. |
| Location | Quincy, Illinois |
4" Adena, Mercer Co., Iowa
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