https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13960868Edit ImageSaveSaveEditCropCustom TextA three headed monster in an alchemical flask, representing the composition of the alchemical philosopher's stone: salt, sulphur, and mercury. Watercolour painting by E.A. Ibbs.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 589 x 1200 px | 300 dpiLarge JPEG 1717 x 3500 px | 300 dpiBest Quality JPEG 1855 x 3781 px | 300 dpiFree DownloadA three headed monster in an alchemical flask, representing the composition of the alchemical philosopher's stone: salt, sulphur, and mercury. Watercolour painting by E.A. Ibbs.More