Gold jewelry chain-making is primarily done by machines, as the technology has surpassed the handmade chain process, and the labor for making each chain link is long and tedious. Find out how most jewelers purchase machine-made chains with information from a bench jeweler and gemologist in this free video on jewelry. Expert: Chuck Koehler Contact: www.cmkcompany.com Bio: Chuck Koehler, a bench jeweler and gemologist, has been in the jewelry industry since 1978. Filmmaker: Dimitri LaBarge