Have you tried a glass tile as pendant? I haven’t.
An oval tile, for example, flat back, non-magnifying and clear, can be used as a pendant. It can be customized according to the design that you want or need. You can use words, photos, patterns, drawings, fabrics or anything that is flat and thin. In order to have a glassy appeal, you can use a Diamond Glaze.
Come to think of it, this can be a nice gift, too.