I can't find a stamp. I've had it for 8 years and it's never changed color. It's for lung cancer awareness, because I lost my mom to this awful disease. That is what the clear crystals represent. It's a nice solid piece of jewelry.
Okay thanks... before any one bids.. .you might want to add to the title "- lung cancer awareness" it will fetch more credits..... I think its real pretty, but I can't wear anything less then silver or silver plated, hence I asked.