The edelstein ink collection comprises several bright colors with a special ingredient that ensures extra smooth writing and it takes care of your fountain pen. The german word edelstein translates as gemstone, and each color corresponds to the beautiful coloring of a gem. Edelstein cartridges are available in six attractive colours and come in a tin containing 6 ink cartridges. These cartridges are international standard, long cartridges. The beautiful, jewel-like colour. Special ingredient ensures the smooth flow from the fountain pen to the page.