A late 17th century Stuart crystal memento mori slide

A late 17th century Stuart crystal memento mori slide, (later converted to a brooch) the faceted rock crystal covering a white enamel skull and crossbones between the initials F and B, on plaited hair and gold wire frame, mounted in gold. 2cm wide.

With another late 17th century Stuart crystal memorial slide (converted to a brooch) the faceted rock crystal covering the initials FB on plaited hair ground, in gold frame. 1.8cm wide.