You didn't specify cut shape, so I'll tell you how to figure the price.
There's a link at the top of the page, click on Price Stats.
There is an A and a B for each cut class, so you need to look at both 3A and 3B. Scroll down the page until you find your carat weight range. The first column is Average Asking Prices and the second column is Low Asking Prices. Find your color and clarity level, then multiply the number in the chart by 0.95, the carat weight of your diamond. That will give you ballpark figures on the price range of the diamond.