I got this for a moonstone pendant.  It has a lobster clasp and the circle that catches in the lobster claw is large and almost didn't go through the pendant opening.  The chain is sturdy but it had black on it in several spots.  I scrubbed it with toothpaste and it came out for the most part.  There is a small amount but its barely visable.  I would not buy again because of this.  I wanted to love it but since it was so flawed I don't .