A 2 carat diamond ring, like this David Marshall 2.05ct oval-cut diamond ring, will cost almost four times as much as a 1 carat diamond ring due to the fact that larger diamonds are rarer, especially when they are of such high quality.

A 2 carat diamond ring, like this David Marshall 2.05ct oval-cut diamond ring, will cost almost four times as much as a 1 carat diamond ring due to the fact that larger diamonds are rarer, especially when they are of such high quality.