Oppi A. J. Untracht (November 17, 1922 – July 5, 2008) was an American master metalsmith, educator, and writer. Born in New York City, Untracht obtained his Master of Fine Arts at Columbia University in 1947. Originally trained as a photographer, he studied Indian arts and crafts and later became an expert on the jewelry of India and Nepal. In addition to being an honorary member of the Society of North American Goldsmiths, in 2000 Untracht was awarded a Lifetime American Achievement Award on behalf of the American Craft Council. His first book, Metal Techniques for Craftsmen is considered a standard training textbook for silversmiths.
- Metal Techniques for Craftsmen (1968). ISBN 0-7091-0723-4
- Jewelry Concepts and Technology (1982). ISBN 0-385-04185-3
- Saara Hopea Untracht: Elämä ja työ — Life and Work (1988). ISBN 951-0-14377-4
- Traditional Jewelry of India (1997). ISBN 0-500-28749-X
- Malarcher, Patricia (February 14, 1988). "Focus on Current Directions in Jewelry". The New York Times. Retrieved April 15, 2011.
- Deitz, Paula (November 29, 1998). "Clusters of Treasures To Clothe the Soul". New York Times. November 29, 1998. Retrieved April 15, 2011.
- Andre, Mila (February 1, 1999). "Indian Jewels Go From Head To Toe". New York Daily News. Retrieved April 15, 2011.
- "In memoriam: Writer Oppi Untracht". The American Council for Southern Asian Art. Retrieved April 15, 2011.
- Obituary: Oppi Untracht (in Finnish) Helsingin Sanomat, 5 July, 2008.