I figured the brain trust of this forum would help me identify a piece that I'm looking for. The piece is a simple solitaire diamond necklace but the unique thing about it is that it has this button that allows you to adjust the length of the necklace in the back. This necklace belongs to a friend of mine and it was purchased it at a jewelry store a few years ago. I don't believe the jewelry store carries it anymore. Any ideas where I could find a similar necklace?