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 Nile is a marketplace that thrives on having a large listing of inventory on their website. By design, they want to have diamonds that are high quality and others that are at a lower quality to be at a lower price point.