The data illustrates the per carat diamond price from 1960 to 2016. In 1960, the average price for such a diamond stood at some 2,700 USD. Since then, the diamond price has increased more than tenfold, to 29,650 USD in 2015.
Diamond carat to dollars Diamonds are a carbon-based gemstone coveted by innumerable people worldwide. They are among the hardest materials on Earth (if not the hardest), which makes them very valuable for industrial uses in addition to their wide use in luxury jewelry. Diamonds are also expensive.