Blue Nile Sells Real Diamonds You can rest assured that all the diamonds we sell are real, and we offer the paperwork to confirm this. If you're purchasing diamond jewelry or loose diamonds from our online jewelry store or local jewelry showrooms, you can rest assured that you are purchasing genuine diamonds.

Fancy vivid blue diamonds are among the rarest and most sought-after gemstones, which often translates into higher prices. As a general guideline, you can expect the price for a fancy vivid blue diamond to start at around $100,000 per carat, for smaller stones with moderate color intensity and clarity.

This is evident when you look at the average retail prices of diamonds by carat weight. On average, the retail price for one carat diamonds can be anywhere between $2,000 to $16,000, and between $8,000 to $72,000 for two carat diamonds .

Blue diamonds are highly sought after by diamond collectors and enthusiasts worldwide. A very small blue diamond can cost a few thousand dollars, and a large one such as the Wittelsbach-Graff diamond can cost millions.