I've had this for a little while, maybe over a month now. I constantly wear it.

it has started to discolor my neck and I can see the silver rubbing off.

I've ordered similar chains but at different lengths and I am surprised that this chain at 18" is changing color and rubbing off when the other ones didn't.

They all have been used normally and the previous ones were used even longer than before, so not sure what is different.

But I would not recommend. I have to stop wearing my pendants because of this chain. I ordered a new one, different brand, so hopefully that works out better.