How much is a .5 carat loose diamond worth?

You can purchase one of this carat weight today on Blue Nile and spend from US$631 to $688, depending on the quality of the stone. These are not the highest quality stones.

The finest stones from the same site will cost you from between US$970 and $1,739.

Every diamond is worth what someone will pay you for it. You can learn more about your diamond by taking it to a certified gemologist, who will help you understand the value of its carat weight, its colour, its clarity and its cut.