The Commemorative Stamp Committee of the American Federating of Mineralogist Societies (AFMS) is trying to convince the US Postal Service to issue stamps featuring birthstones (one gem for each month: garnet, amethyst, aquamarine, diamond, emerald, moonstone, ruby, peridot, sapphire, opal, topaz, turquoise). The committee is to thank for the beautiful Mineral Heritage stamps sets from 1974 and 1992. You can support the request by writing to the USPS Citizens' Stamps Advisory Committee. You can find more information and promotional material on the committee page.