MinBulFos recommends:
Site of Lopatkin Oleg – Russian traveller and mineral collector
Rimma – NikolayBulgariaMineral and Fossil Collection
Mineral Collector’s Page
Agate and mineral specimens from Bulgaria, amethyst collector and designer cabochons, natural druse
National Museum of Natural History,Bulgarian Academy of Science, Sofia
Earth and the Man National Museum,Sofia, Bulgaria mineral and locality database