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Revenue Mineral Property Sale	12 Months Ended
Dec. 31, 2018
Revenue Recognition [Abstract]
Revenue Mineral Property Sale	5. Revenue mineral property sale On April 26, 2018, Solitario sold its royalty interest in the non-producing Yanacocha property (the “Yanacocha Royalty”) to a wholly owned subsidiary of Newmont Mining Corporation (“Newmont”) for approximately $502,000 in cash. The Yanacocha Royalty covered 43 concessions totaling 36,052 hectares. Newmont owns the underlying mineral concessions covered by the Yanacocha Royalty. None of the concessions covered by the Yanacocha Royalty had any reported reserves or resources. Solitario had no mineral property capitalized cost in the Yanacocha Royalty and recorded Mineral Property Revenue of $502,000 during 2018.

Revenue Mineral Property Sale

12 Months Ended

Dec. 31, 2018

5. Revenue mineral property sale

On April 26, 2018, Solitario sold its royalty interest in the non-producing Yanacocha property (the “Yanacocha Royalty”) to a wholly owned subsidiary of Newmont Mining Corporation (“Newmont”) for approximately $502,000 in cash. The Yanacocha Royalty covered 43 concessions totaling 36,052 hectares. Newmont owns the underlying mineral concessions covered by the Yanacocha Royalty. None of the concessions covered by the Yanacocha Royalty had any reported reserves or resources. Solitario had no mineral property capitalized cost in the Yanacocha Royalty and recorded Mineral Property Revenue of $502,000 during 2018.