Also, Meg:
Lady Mimi may not be able to give the provenance, occult use and best ritual to use with every single thing in her store (she has hundreds and hundreds of great things, f'Gawdess' sake, but I'd be willing to bet she could give you some view on your pendant's best use. Please consider her a resource for information. She may be able to give you a quick reminder of what you both talked about or, with a bit of time (and a small donation for that time and learning!) help you with some ritual hints.