Itronics Reports A 224 Percent Increase In 2020 Silver Bullion Sales 'Breakthrough' Pilot Scale Circuit Board Refining Operation Improves Recovery Efficiency News provided by Share this article Share this article RENO, NV, Dec. 29, 2020 /PRNewswire/ -- Itronics Inc. (OTC: ITRO), an emerging 'Cleantech Materials' growth Company that manufactures GOLD'n GRO Multi-Nutrient Fertilizers and produces silver, zinc, and critical minerals recovered from industrial and mining waste, today reported its 2020 silver sales were up 224 percent over the prior year. Full year 2020 silver sales are $141,500 compared to $43,700 in 2019. The increase includes results from sales of silver bullion, silver-bearing glass, and silver-bearing x-ray film. The proceeds from silver bullion sales include the value of gold and copper recovered from discarded printed circuit board assemblies.