It’s either 585, or 750 stamped I can’t read it the iPhone, 15+ camera is really bad. Maybe you can zoom in on it and see with a magnifying glass. This is a solid heavy ring with white gold and yellow gold band. The white gold is at the top where the baguette diamonds are. It’s a very pretty simple band ring, if you pay $500 for it you can have it authenticated otherwise you can get a better deal for 400. I’m gonna list it for five but I won’t take less than four. It’s a beautiful ring. It’s a designer ring. It’s either a size 7 or 7 1/4. This ring is solid, gold heavy not flimsy at all. I am guessing it’s 18 karat gold. It looks like a 750 stamp.