This necklace by Patricia Locke is made of silver (not sure if that means sterling) and …. mystery stones. I am never sure why websites (particularly good ones like The Giving Tree, where this can be purchased) don’t provide information on metal content, stones, weight, finish, length/size, etc. But …. they didn’t in this case.

It sells for USD $288 if you are inclined to contact them to find out more, or just prefer to be surprised.