Berlin ironwork necklace ca. 1815 possibly German, Berlin Ironwork jewelry is an important category of nineteenth century jewelry, and this necklace represents the first example in the Museum's collection. Berlin was a major center of production of ironwork jewelry, and neoclassical designs strongly influenced early Berlin work in this medium. This necklace is unusual in its combination of ironwork with polished steel.. Berlin ironwork necklace. possibly German, Berlin. ca. 1815. Iron, steel, patinated silver