https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/12149932Edit ImageSaveSaveEditCropCustom TextWorkman weighing sample of gold ore and cyanide solution to determine if proper concentration of liquid is being maintained. Mogollon, New Mexico by Russell LeeView public domain image source hereMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseEditorial use only JPEGTIFFSmall JPEG 1200 x 923 px | 300 dpiLarge JPEG 3500 x 2693 px | 300 dpiBest Quality JPEG 13709 x 10549 px | 300 dpiTIFF 13709 x 10549 px | 300 dpi | 138.01 MBFree DownloadWorkman weighing sample of gold ore and cyanide solution to determine if proper concentration of liquid is being maintained. Mogollon, New Mexico by Russell LeeMore