Blue Nile Review (the short story): In the world of internet diamonds, they are the 800 pound guerilla in the room. They offer the largest inventory of GIA Excellent cut diamonds in the world. As a matter of fact, a quick glance at their inventory shows that there are 132,865 diamonds to choose from. However the reality is that all those choices can be a bit overwhelming. Thankfully, I’m going to teach you exactly what to look for and how to buy the best diamond from Blue Nile.

The purpose of this Blue Nile Review is to provide you with a crash course in diamond buying. Despite what many people think, it’s not as simple as limiting your search to GIA Excellent. It’s important to understand how subtle differences in crown and pavilion angle affect light performance. And you also want to be aware of the effects of contrast brilliance and obstruction.

We’ll get to all that in a minute. But first, you probably want to know whether Blue Nile is a good company to buy from. After all, that’s why you’re reading this Blue Nile review to begin with. Right? Just because they’ve been around since 1999, doesn’t mean you can trust them. Am I right?

Build Your Own Engagement ring on Blue NileThe largest inventory of GIA Excellent cut diamonds online!

Blue Nile Review: Diamond Search

It goes without saying that you want to buy the best diamond from Blue Nile. As a matter of fact, you want it to sparkle like crazy and literally blind everybody who sees it. Am I right? With this intention in mind, you’re going to want to download the Ultimate Diamond Buying Cheat Sheet. Print it out and keep it next to you while you search for diamonds.

Then set the search criteria on Blue Nile like this:

Blue Nile Review, where to buy the best diamond

Before you get too far along, take a moment to adjust the slider for “Cut” to Ideal / Signature Ideal. Just that simple act, reduced the number of diamonds available to 95,649! But that’s still to many options to consider. So we’re going to keep fine tuning things as we proceed through this Blue Nile review.

For the sake of this example, use the following basic settings:

  • Shape: Round
  • Price: up to $10,000
  • Color: D to I-color
  • Clarity: VS-2 to Flawless (FL)

This reduces the number of options down to 2,691 but we still need to set the Advanced Filters.

Build Your Own Engagement ring on Blue NileThe largest inventory of GIA Excellent cut diamonds online!

Blue Nile Review: Advanced Filters Settings

The simple act of setting the Advanced Filters on Blue Nile to my preferred range will significantly reduce the options. Click on the Advanced Filters option in the lower right corner of the diamond search settings. And then you’re going to want to set the parameters to look like this:

Blue Nile Review, how to pick the best diamond

The number of diamonds available has decreased to only 310. That’s a step in the right direction, but checking the box next to 360º brings that number down to 111. That’s a much more manageable number and this limits the options to only those with video of the diamond. By the same token, we’ve significantly improved the quality of choices to choose from.

Why is that? Because a round brilliant cut diamond with a total depth deeper than 61.8 – 61.9% is not likely to perform well. This is because the crown and/or pavilion sections are going to be too deep. Which means that light will not reflect properly, or the balance of brilliance and dispersion will be off.

To say nothing of the fact that the visible outside diameter of the diamond gets smaller when the total depth is deeper. Which means that you’re paying a premium for diamond carat weight, which is buried in total depth. Which is why you want to limit your search to round diamonds with a total depth between 59 – 61.8%

Build Your Own Engagement ring on Blue NileThe largest inventory of GIA Excellent cut diamonds online!

Blue Nile Review 360º Diamond Video:

Blue Nile is in the process of adding more and more 360º videos to show off their diamonds! This is great because until recently, only Blue Nile Signature diamonds featured images. The first thing you want to do is click the arrow to the right of the listing. That will open up the video of the diamond in a window to the right:

Blue Nile Review 360 degree video diamond buying tips

Then you want to right click your mouse over “More Details” and choose to open the page in a new tab. Repeat this process for every one of the 111 diamonds available. It goes without saying that your going to have a million tabs open in your browser. Be that as it may, this is how to find the best diamonds on Blue Nile.

Build Your Own Engagement ring on Blue NileThe largest inventory of GIA Excellent cut diamonds online!

Reviewing Blue Nile Diamonds by the hundreds:

I have to admit that it can seem a bit daunting to have 111 tabs open in your browser. But actually, it’s not going to be 111 tabs, because you’re going to skip over any diamonds with a culet size other than none or pointed. So if you see a culet size of small or very small, just skip over that option.

Once all the tabs are open, you’re going to click on each one to view the diamond details page. Don’t waste any time looking at the video (yet) just click on the icon for the lab report. Don’t wait for the lab report to open, just go straight down the line of tabs, clicking on each one, opening up the diamond grading and proceeding to the next. It took me less than 10 minutes to open all the tabs, click on the lab reports and run through the next step.

Blue Nile reviews, GIA 2246856241 best proportionsWhich is to eliminate all the options with the right offset for crown and pavilion angle. In order to do this so quickly, you only want to focus on the portion of the proportions diagram highlighted in green.

You are only interested in diamonds with a crown angle between 34.3 – 35.0 degrees, offset by a pavilion angle between 40.6 – 40.9 degrees. This will produce a virtual balance of brilliance and dispersion with a high volume of light return.

Don’t waste your time looking at anything else. Just close the tab on any diamonds with proportions outside this range. If you’re following along, you now have only 26 diamonds to choose from. The remaining diamonds represent the Top 1% of the annual production of rounds.

Build Your Own Engagement ring on Blue NileThe largest inventory of GIA Excellent cut diamonds online!

Picking the Best Blue Nile Diamonds:

Review Blue Nile diamonds, GIA 6173877258 best proportionsBy now you probably realize that we’re reviewing the diamond details in waves. Each pass ensures that we’re only considering the best of the best. Not to mention the fact that we’re eliminating options that are not likely to produce the best light performance.

With that in mind, the next pass focuses on 3 things. See the red line running over the measurement 16% in the picture to the right? You want to make sure that measurement is not 16% or deeper. Because a 16% crown height is not conducive to a crown angle between 34.3 – 35.0 degrees.

Then you want to make sure that the pavilion depth is between 42.5 – 43.3% which goes with a pavilion angle between 40.6 – 40.9 degrees.

Now this next step is kind of optional, but it can make all the difference in the world. The 75%  measurement circled in green indicates the length of the lower girdle facets (LGF). If you like sparkle that is larger in size and bolder in appearance, then focus on options where this measurement is between 75 – 78%

If you think you might prefer pin-fire type sparkle which is smaller in size, then look for options that are between 79 – 80%. I personally prefer the sparkle created by LGF’s in the range of 75 – 78% (but this is kind of a minor point).

Build Your Own Engagement ring on Blue NileThe largest inventory of GIA Excellent cut diamonds online!

10 Diamonds Left in our Blue Nile Review:

All right, so you’ve eliminated all the options with proportions outside the preferred range. And if you’ve followed my lead, you’ve closed the tabs for all the diamonds with 80% lower girdle facets. Which leaves us with 10 Blue Nile diamonds left to review. You’ll want to flip through the diamond grading reports really quick to make sure that the following inclusions do not appear under the key to symbols:

  • Cavity
  • Chip
  • Etch Channel
  • Knot
  • Laser Drill Hole

Because all of those clarity characteristics can pose a durability issue. In this particular instance, none of the diamonds contain these undesirable inclusion types. So let’s move forward with our Blue Nile review…

The Winner of Our Blue Nile Review:

Blue Nile Review, 360 degree diamond video, LD07829573So the next step is to close all the diamond grading reports and take a look at the diamonds. Just click your mouse over the “X” located in the upper right corner of the diamond grading report.

Then click on the icon of the diamond in the face-up position as indicated by the green arrows. This will stop the diamond from rotating in the video and enable you to judge the degree of contrast brilliance. This diamond has really nice contrast brilliance, as evident by the contrast exhibited by the arrows.

And as you can see, there is very little obstruction evident under the table facet. So this is the diamond that I would be most apt to buy as a result of this Blue Nile review. If you’re wondering why I’m not pointing out which diamond it is, that’s because it’s likely to be sold by the time you read this review of Blue Nile. It’s better if we run a fresh search when you’re ready to buy a diamond. Speaking of which, be sure to take advantage of my free Diamond Concierge Service.

Nice Ice Diamond Concierge ServiceTake advantage of 30+ years diamond buying experience for free!

Search Blue Nile step-by-step:

All right, so this is how a professional diamond buyer like myself approaches buying a diamond on Blue Nile. Obviously this approach is probably different than what the average consumer will do. But then again, you’re probably not looking to buy a diamond that is just average diamond.

Let’s review the steps real quick:

  • Adjust the sliders for carat weight, color, clarity, etc.
  • Adjust the slider for Cut to Ideal / Signature Ideal.
  • Click on Advanced Filters
  • Set Polish and Symmetry to Excellent.
  • Select the Degree of Blue Fluorescence.
  • Adjust the Depth to be between 59 – 61.8%
  • Adjust the Table to be between 53 – 58%
  • Click on More Filters and Add Column for Culet Size.
  • Open All The Diamond Details Pages in a New Tab.
  • Open all the Diamond Grading Reports.
  • Verify Proportions are within the preferred range.
  • Check the Inclusions under Keys to Symbols.
  • Evaluate Static Diamond Image for Contrast Brilliance.
  • Evaluate the Degree of Obstruction.
  • Put Diamond in Your Shopping Cart
  • Ask me for your Blue Nile coupon code!

Now if you think about it, this whole process really breaks down into 3 easy steps:

  1. Set the Search Criteria & Advanced Filters.
  2. Evaluate the Details on the Diamond Grading Report.
  3. Review the Blue Nile 360º Video

I hope that you enjoyed this in-depth Blue Nile review. Remember that it took me only 20 minutes to review the details for 111 diamonds and pick the best one. Of course, I’ve been buying diamonds professionally for 30+ years. This stuff is kind of second nature for me. Which is why it might be easier if you just take advantage of my free Diamond Concierge Service.

Build Your Own Engagement ring on Blue NileThe largest inventory of GIA Excellent cut diamonds online!


Blue Nile scores 4 out of 5 stars in this review by Todd Gray