Can you identify this Victorian item?

A Queen Victoria cameo with long chain that's adjustable when worn, is one of the many items on display at the Sparta Historical Society (SHS) "Victorian Jewelry Curiosities Exhibit," which opens on Mother's Day, Sunday, May 12, with brief talks at 1 p.m. and 3 p.m. The exhibit will continue with lectures on the following Sundays; May 26, June 9 and June 23, 2019. For more information about the events or to find out how to join the Sparta Historical Society, visit https://www.vankirkmuseum.org/.