Tucson Ring
Puerta de los Muchacos, Pima County, Arizona,
USA.
Iron: Ataxite, Ni-rich, Anomalous (IRANOM).
Found: 1850, before this date.
Total known weight: 668 kg.
Tucson Ring at Smithsonian - Martin Horejsi
Tucson Ring Endpiece with drill hole - Martin Horejsi