https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13958040Edit ImageSaveSaveEditCropCustom TextGeology: various uncut semi-precious stones. Coloured lithograph by H. Sowerby after himself, 1851.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 838 x 1200 px | 300 dpiLarge JPEG 2242 x 3209 px | 300 dpiFree DownloadGeology: various uncut semi-precious stones. Coloured lithograph by H. Sowerby after himself, 1851.More