I got this necklace in sterling, much less expensive, so keep that in mind while reading this review. I wanted something with "twinkle " on my neck, but not something clunky. There is something about the dot-dash design that produces "twinkle". It is light weight, I am not aware of its presence. No problem leaving it on while sleeping. This is what it does: It draws attention to your body, not the piece itself. If you can catch a good sale, get it.