https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13953145Edit ImageSaveSaveEditCropCustom TextOptics: crystals exhibiting interference colours. Colour mezzotint [] by R.H. Digeon, ca. 1883, after J. Silbermann.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 812 x 1200 px | 300 dpiLarge JPEG 1331 x 1967 px | 300 dpiFree DownloadOptics: crystals exhibiting interference colours. Colour mezzotint [] by R.H. Digeon, ca. 1883, after J. Silbermann.More