Sao Tome and Principe   overview   Date of issue: ??.??.2007 Value and Mineral:  Bloc 1x7000 - 1x9000 - 1x10000 - 1x14000 Db  7000 Db - Barite, Calcite, Quartz  9000 Db - Emerald, Malachite  10000 Db - Amazonite, Microcline, Tourmaline  14000 Db - Amethyst, Quartz, Topaz