This is an triangular, openwork, dress clip with bezel-set clear and blue glass "gems" riveted to the back plate and two cherub heads along the sides. It is in the Renaissance revival style. The gold clip on the back appears to be a replacement.
14K on reverse lower prong
Gift of Joe Sataloff to Jody Sataloff, 2007; Gift of Jody Sataloff to the MFA, October 22, 2008.
Gift of Jody Sataloff