Blue Diamond Engagement Rings
Tips to Find Your Perfect Colored Diamond

blue diamond engagement rings

Blue diamond engagement rings hold an enchanting and instantly captivating very rare fancy color diamond. If you have fallen in love with the thought of a beautiful blue engagement ring, with this info you can be sure to find the perfect diamond for your ring.

Here you'll find fancy blue diamond properties, grading and price guides, tips on where to find colored diamond engagement rings plus affordable alternatives to natural blue diamonds - after all, these fancy color diamonds command some of the highest prices per carat! And if you have any blue diamond wedding ring questions, or would like to post comments, reviews or pics of your fabulous blue engagement ring, just use the handy comment box at the end of the page.

blue diamond wedding ring

Blue Diamond Properties

Blue diamonds have properties which are very similar to colorless diamonds - including a perfect 10.0 on the Moh's hardness scale and unrivaled brilliance and fire. The main difference between a blue diamond and a colorless diamond is the presence of boron.

Rare blue diamonds have boron particles scattered throughout their structure, and less than one percent of all diamonds ever found have these types of impurities. Another very unique characteristic of blue diamonds is that these diamonds are natural semiconductors.

Created Diamonds

Blue Diamond Clarity and Cut Grades and Certification

Blue diamonds are graded just like regular diamonds in terms of cut and clarity. The ideal diamond grades to stick with for blue diamonds in blue diamond engagement rings include:

  • Excellent to Good cut grades

  • Clarity grades of I1 and above

With blue diamonds, there is a bit of leeway when it comes to clarity - because the blue color can hide some inclusions. However, because severe inclusions can affect the stability of a diamond it is still best to stay with I1 and above clarity grades.

The two top diamond certification laboratories for fancy color diamonds are the Gemological Institute of America (GIA) and the International Gemological Institute (IGI).

Both of these laboratories issue diamond certifications which address the unique needs of fancy color diamonds. In addition to a standard certification on a diamond's cut, clarity and carat size - the labs issue a separate color certification that assess the diamond's color hue, saturation and intensity and also verifies if the color is natural or artificially enhanced.

For colored diamond engagement rings, or loose colored diamonds, it is best to purchase rings/diamonds that come with a GIA or IGI report.

Blue Diamond Prices and Values

Blue diamonds are classified, from lightest to darkest as:

  • light fancy blue

  • fancy blue

  • fancy intense blue

  • fancy vivid blue

And the price of a blue diamond will dramatically increase as the intensity of the blue color increases too.

On average, a 0.5-carat light colored loose blue diamond will cost around $50,000 dollars, and an intense blue 0.5 loose diamond will cost around $135,000 dollars. A medium toned 1-carat blue diamond (fancy blue to fancy intense) is around $200,000 dollars.

Discover Luxury Natural Loose Blue Diamonds at
Blue Nile!

The price and value of a blue diamond will also depend on the diamond’s cut and clarity characteristics too - but by far color and carat size are the two most important C's for determining the value of fancy blue diamonds.

If the price for real blue diamond engagement rings is way too high for your budget - don't worry! There are plenty of much more affordable alternatives that can still offer an exquisite look for the right price.

Affordable Blue Diamond Engagement Rings and Blue Diamond Alternatives

Fun Fast Facts About Blue Diamonds!

The Hope Diamond - at 45.52 carats - is one of the largest, and most famous, of all fancy blue diamonds ever discovered.

Blue diamonds are some of the rarest fancy color diamonds known.

What element contributes to the blue color in diamonds? Boron.

Top Blue Diamond Engagement Ring Picks!

1. Synthetic Blue Diamonds

One of the best alternatives to real fancy blue diamonds are man made synthetic blue diamonds - these diamonds have the exact same properties as natural diamonds, the only difference is that they were made in a laboratory instead of in nature. And like natural rare blue diamonds, synthetic blue diamonds should come with a GIA or IGI certification.

On average, synthetic blue diamonds are priced around $3,000 for a 0.5-carat or $8,500 for a 1-carat stone. Like natural blue diamonds though, the price of synthetic blue diamonds increases with the saturation of the blue color and the carat size.

Eco-Friendly Lab-Grown Diamonds

2. Enhanced Blue Diamonds

Enhanced blue diamonds are real natural colorless diamonds that have been permanently treated - through heat or irradiation - to create a beautiful blue color. If you are looking for big blue diamonds in larger carat sizes, enhanced blue diamonds are definitely one of the best choices because it is difficult to find synthetic diamonds over 2 carats in size.

Blue diamonds which have been enhanced should also come with a GIA or IGI certification.

3. Blue Gemstone Engagement Rings

For a blue engagement ring, gorgeous blue gemstones can also offer an affordable alternative to real blue diamonds - and most blue gemstones are less expensive than blue synthetic or enhanced diamonds.

Three gemstones which can offer outstanding durability - and eye catching style - for beautiful blue engagement rings include blue sapphires, blue topaz and blue aquamarine.

Blue sapphires have flash and fire characteristics which are closest to those of a natural diamond. And while most blue sapphires are a lot darker than natural blue diamonds, blue sapphires have their own beauty and sparkle and are quite dazzling in engagement and wedding rings.

Blue topaz gemstones have a blue color tone that is a lot brighter than natural blue diamonds, but they are an affordable alternative if you are looking for an engagement ring that sports a blue gemstone. For a darker blue color, the London blue topaz gemstone are an excellent choice too.

Blue aquamarine gemstones showcase a gorgeous display of marine blue, plus they are affordable and extremely durable too. Aquamarines do have lower flash and fire qualities than blue topaz and blue sapphire gemstones, but even with these less eye catching properties aquamarines are treasured for their natural beauty and luster.

wedding ring shopping tips

Shopping Tips and Recommendations for Blue Diamond Engagement Rings

Because blue diamonds are so valuable, couples need to use extreme caution when shopping for a blue diamond wedding ring or a loose blue diamond.

The number one way to protect yourself as a buyer is to stick with natural, synthetic or enhanced blue diamonds that come with either a GIA or an IGI certificate.

Because mounted diamonds cannot be graded for certification, if you have found a rare blue diamond antique engagement ring keep in mind that the ring should come with an appraisal and certificate of authentication from a third party - like the American Gem Society.

EWR's top recommendations for blue diamond engagement rings include:

Created Diamonds

CD has a lovely selection of GIA and IGI certified synthetic loose blue diamonds and blue diamonds that are mounted in engagement rings. You can also find a blue diamond wedding ring here in platinum, 14k and 18k white or yellow gold and in sizes from 0.10-carat up to 2-carats. Prices start at under 1,000 dollars too and go up to around $10,000 dollars.

Blue Nile

For real natural GIA certified loose rare blue diamonds, Blue Nile usually has a few in stock (and these are guaranteed conflict free too) - often under 1-carat in size and priced between $50,000 to $100,000 dollars. Blue Nile will also mount loose diamonds in a ring style of your choice.


For enhanced blue diamond rings, including rings made with big blue diamonds up to 4 carat in sizes, Zales has an impressive selection of affordable, dazzling color diamond engagement rings.

The best of luck searching for blue diamond engagement rings, I sincerely hope with this info you can find the perfect blue diamond ring of your dreams - and feel free to use the comment page below to send in questions, comments, reviews and pics to share with future visitors!

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