I recently won a necklace in a box that looked just like this one.. in a crane machine. I had the same issue with the chain.. I have a feeling this is the same type of necklace.

My mom really likes this necklace and it's very pretty, but the chain it comes on snags. I've caught her struggling to fix her necklace several times. The pendant clings to the necklace a will wind up on her collar bone. She has to slowly pull it back down over the chain to center it. It really needs a better chain. But the pendant is nice.

got this my mom on mother's day and she loved it. but i'm not sure if she wears it? hmmm