Blue and silver necklace

Beautiful, blue and silver teardrop shaped stone, on a silvertone chain with several matching beads on it, as well. Its gorgeous, but I believe it's classified as "costume jewelry"....the chain needs to be cleaned, its been worn quite a bit, with my favorite outfit, which is also for sale, I prefer to sell this WITH the entire outfit together, but I am willing to seperate, however, the items WILL be more expensive this way, it was a gift from someone and I wish I didn't have to sell it at all!