Probably different depending on region. Our engagement rings were slate white gold and platinum. When we picked out her wedding ring we first went to jewelers. Everything there was kinda ugly. No elegance, just mass-produced bulky stuff. Unless you want to cough up at least 3000€. So we checked an auction house. Found a gorgeous diamond ring from the 1930s, real elegant and you could see the craftsmanship in every little detail. And I got it for 400€. Then took it to a jeweler to size it and engrave it.