On average, a diamond wedding band will cost you between $400 to $10,000. But why such a wide range in cost? Well, like engagement rings, diamond bands can vary in everything from design to metal choice to size of the diamonds. Factors like the quality and total carat weight of the diamonds, as well as the craftsmanship of the band itself, play significant roles in determining the price. Want a custom design with platinum metal and a massive 10 total carat weight? Sure! But that will cost a lot more than a simpler design with a more affordable metal.