Thank you for all of your replies
SnowCat wrote:Ask the pendant what it wants you to do.
I liked this idea, so I cleansed it and asked it which option it wants me to choose (throw it away, give it to someone, return it to the earth, or to continue using it myself) and after confirming the answer three times, it was a very definitive "return it to the earth"
Unfortunately there is no way to return it to the owner, as I took it from a store, and no longer live on even the same continent as the shop, so returning it to the earth like Twilight suggested is my best option.
Your responses have all helped tremendously
I will continue to travel down the path of recovery, and I feel that this is a big step for me.