Geology: various uncut semi-precious stones. Coloured lithograph by H. Sowerby after himself, 1851. https://www.rawpixel.com/image/13958040/image-person-art-public-domainFree Image from public domain licenseEmerald stone background backgrounds gemstone jewelry. https://www.rawpixel.com/image/14054667/emerald-stone-background-backgrounds-gemstone-jewelryView licenseJewellery necklace gemstone jewelry. https://www.rawpixel.com/image/14035932/jewellery-necklace-gemstone-jewelryView licenseEmbleem: maagd (1723) by Jan Goeree, Jan Goeree, Gerard onder de Linden and Johannes van Braam https://www.rawpixel.com/image/13782275/image-paper-cartoon-faceFree Image from public domain license