https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/12146559Edit ImageSaveSaveEditCropCustom TextOld muffle furnace for assaying gold ores. Two Bit Creek, near Deadwood, South Dakota by Russell LeeView public domain image source hereMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGTIFFSmall JPEG 943 x 1200 px | 300 dpiLarge JPEG 2750 x 3500 px | 300 dpiBest Quality JPEG 10810 x 13759 px | 300 dpiTIFF 10810 x 13759 px | 300 dpi | 283.84 MBFree DownloadOld muffle furnace for assaying gold ores. Two Bit Creek, near Deadwood, South Dakota by Russell LeeMore