Yes, it is very possible to put a spell, energy, or blessings on an inanimate object such as piece of jewelry. By doing so you are creating amulets. Amulets exist in every culture worldwide from the beginning of time.
If you want to do this yourself, google the words "How to charge with energy" or soemthing like that. Most modern magic call this technique "charging," so you should find about a million how-to pages online, maybe there's some on this site too.