Raw gold was mostly panned from rivers; such gold often contains platinoid inclusions—tiny bits of other kinds of metals such as iridium and osmium, which have higher melting points than gold. One of these inclusions within the surface of the Ornament can be seen in photographs taken under the microscope. This is evidence that the object was made from panned gold.
- Exploring Art of the Ancient Americas: The John Bourne Collection Gift. The Walters Art Museum, Baltimore; Frist Center for the Visual Arts, Nashville. 2012-2013.
- Gold of the Ancient Americas. The Walters Art Museum, Baltimore. 2015.