The rather smooth bright green turbans, 50 to 80 mm, which are found in bins and baskets in tourist shops are acid-cleaned Turbo argyrostomus. The unnatural color is due to the acid cleaning (as is the smooth feel of the shells). The small (1 to 1-1/4 inches) turbans that are frequently found in craft mixes, etc. may of course include juvenile T. argyrostomus, but many of them are Turbo stenogyrus Fischer, 1873. This is superficially similar to T. argyrostomus, but is consistently smaller, more angular in outline, has mostly finer cords but with a few larger raised cords, and is much more variable in color than T. argyrostomus. It can be cream to tan to brown to greenish, with markings in white, green, black, and sometimes red. This is abundant in Japan and Taiwan, and is exported by the ton for craft purposes. Regards, Paul M. Several specimens can be seen here: http://www.petdiscounters.com/small_animal/reptile/hermit/zz_shell_green_tur bo_stenogyrus.html