How much does it cost for a 4 carat diamond?

The value of a diamond depends on its cut, colour, carat weight and its clarity. A local jeweler can answer your question.

You can buy a round cut diamond of this weight today from Blue Nile and spend from about US$40,000 to about US$56,000. An investment-quality diamond -- with a higher clarity rating -- starts at about US$56,000.