ah, mystery solved thanks to miss tiff. she recently did a post on my big, brass bling necklaces, indicating that the pieces are indeed saddle ornaments. (which was my first hunch) the official name for the pendant is a horse brass. here is an illustration of a fully-ornamented horse, and below are some shots tiffany took wearing the necklaces. they are for sale in her web shop, and I have a few pieces available on the site.