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3. Sales of Products: Schedule of sales of products by metal (Details) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Details    
Gold $ 1,208,904 $ 727,508
Silver 3,973 3,585
Smelter and refining charges (111,486) (41,775)
Total revenue $ 1,101,391 $ 689,318