A talented young fashionista going by the name of ComparativeRarity has created a line of bracelets and necklaces that invoke everypony's six favorite embodiments of friendship. They came out looking very pretty, don't you think? She's apparently looking into starting an etsy store, so any of you out there who are man enough to be seen wearing colorful jewelry should definitely keep an eye out! Just think of how much Rainbow Dash would respect you for wearing a pendant designed around her! In all seriousness, this is pretty neat stuff, and worth your time to check out.
The craftspony is also looking for suggestions on non-mane cast members to design jewelry for, so if you've got any suggestions (hint: say Lyra), then you should drop her a line and help out. But for now, check out all of the original line over on her DeviantArt page:
ComparitiveRarity's Gallery of Pony Jewelry