Antique 19th century Berlin Iron necklace with a Berlin Iron heart and cross. Berlin Iron jewelry is highly prized for its intricate work and rarity. During the Napoleonic Wars wealthy Germans gave their precious jewels for the war effort and substituted them with iron jewelry. Some of the pieces were inscribed, "Gold gab ich fur Eisen"; meaning "I gave gold for iron". Today these pieces are as desirable as in the early 1800's. The chain measures 22"long and the drop with the cross measures 6 1/2" long, the cross is 2 1/2" wide.