I know the chain is 18k white gold because I bought it at walmart. The 5 cz stones have breathing holes under each stone which shows the stones are real. Stones have to breath..thats the 1st sign of real stones. Ive had this pendant for a couple of years and It has ALWAYS kept its shines. Its really like weight, and metal is heavier thats why I would it Is real silver by the weight.
I just looked at it again under a magnifying glass and there is appears to be some kind of marking underneath. The whole heart shines and reflects kind of like gold does. It is sooo gorgeous!!!