These "Memento Mori" bands are in the collection of the Victoria & Albert Museum, most of them from the mid-late 1700s. No matter how many times I see this type of ring - gold, enamel, engraving - I am always stunned. You too? There is a company that specializes in making modern-day sentimental rings, modeled after Georgian and Victorian rings like these. They are pretty fantastic. I'll be blogging about them tomorrow!
Also, this page from a London jeweler's design album, done in pencil and watercolor, shows three possible designs for mourning rings. The delicate drawings are almost as wonderful as the rings themselves!
Images courtesy of the Victoria & Albert Museum