Top 10 Best Blue Diamonds | 2021 Reviews + Guide

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Blue diamonds are one of the most desired and rarest gems in the world. They make a stunning impression in almost any jewelry piece. Due to its magnificent and alluring color, fancy blue diamonds have attained incredible popularity among the rich and famous, including the elites and royalties.

For those lucky enough to afford one, a blue diamond is a great center stone for a classy engagement ring. You can also find treated or synthetic blue diamonds that are budget-friendly alternatives if you want a more affordable option.

While most gem enthusiasts are aware of the four Cs of colorless diamonds, not all are familiar with fancy-colored blue diamonds’ quality factors. This buying guide will shed light on everything about blue diamonds. This way, gem buyers like you can create an informed decision before they make a purchase.

This article will delve into the best blue diamond loose stones in two leading online diamond jewelry retailers worldwide: Blue Nile and James Allen. You will also discover how these two brands differ regarding their range of blue diamond gems. Not only that, you will find a buyer’s guide on how to choose a perfect blue diamond that is right for you.

Read on and see how each stone gets evaluated for quality and color and how you should buy a blue diamond.

Top 10 Best Blue Diamonds Reviewed

  1. 0.72 Carat Intense Blue Round Diamond by Blue Nile – Best Overall
  2. 2.15 Carat Fancy Blue Oval Diamond by James Allen – Best Value
  3. 0.76 Carat Intense Blue Radiant Cut Diamond by Blue Nile – Editor’s Choice
  4. 0.45 Carat Fancy Blue Radiant Diamond by James Allen
  5. 1.01 Carat Light Blue Pear-Shaped Diamond by Blue Nile
  6. 0.26 Carat Fancy Light Blue Radiant Diamond by James Allen
  7. 0.33 Carat Gray-Blue Pear-Shaped Diamond by Blue Nile
  8. 0.30 Carat Light Blue Marquise Cut Diamond by Blue Nile
  9. 0.25 Carat Fancy Blue Round Diamond by Blue Nile
  10. 2.01 Carat Light Blue Radiant Cut Diamond by James Allen

#1. 0.72 Carat Intense Blue Round Diamond by Blue Nile – Best Overall

Specifications: 

  • Carat Weight: 0.72 carats
  • Shape: Round
  • Color: Intense blue
  • Clarity: SI2
  • Polish: Very good
  • Measurement: 5.73 x 5.68 x 3.43 mm

If you want a classy yet sparkling center stone for your engagement ring, the 0.72-Carat Intense Blue Round Diamond by Blue Nile is your best choice. Round blue diamonds offer the most exceptional beauty and brilliance. In general, round-cut diamonds are the most well-known shape for diamonds. Plus, round diamonds do a very good job of reflecting light and provide more luster than any other shape. 

A well-cut round blue diamond such as this stone is certainly eye-catching when mounted in any blue diamond ring setting. Another great thing about round blue diamonds is that they exhibit a superior amount of fire, giving the diamond an intense character and beauty. 

Due to its classy and sophisticated appearance, a round brilliant-cut blue diamond is highly versatile. It goes well on various styles, from vintage engagement rings, modern round-cut diamond rings, pavé setting, three-stone rings, and more. It also makes a great heirloom since round cut diamond rings are consistently popular and timeless, which you can pass down for generations.

ProsCons
Very versatile for all types of ring settings
A high amount of round diamond wastage
Goes well with any jewelryMost expensive of all diamond cuts
Unmatched sparkle

#2. 2.15 Carat Fancy Blue Oval Diamond by James Allen – Best Value

2.15 Carat Oval Diamond

Specifications: 

  • Carat Weight: 2.15 carats
  • Shape: Oval
  • Color: Fancy blue
  • Clarity: VS2
  • Polish: Very good
  • Measurement: 9 x 6.69 mm

An oval-cut fancy blue diamond is considered one of the most expensive varieties of blue diamonds. One example is the 2.15 Carat Oval Diamond from James Allen. With its bursting with fire and brilliance, this oval-cut diamond is simply unique and exquisite. Tagged as a “fancy shape,” an oval diamond has an elongated design making it appear bigger than other shapes with the same carat weight. 

This oval-cut fancy blue diamond gives off a very elegant and one-of-a-kind impression, ideal for anyone who wants something different. Given its slender body, this gorgeous fancy blue diamond can make your hand and fingers look slimmer. Plus, it has no sharp corners, making it less vulnerable to chipping. 

If you prefer a rounded blue diamond with intense character, an oval-cut fancy blue diamond is a great choice. Also, they are mostly priced lower than round brilliants.

ProsCons
Perfect for shorter fingers for a lengthy impressionTends to have a bowtie effect from invisible to severe
No vulnerable sections and sharp edges
May include inclusions and flaws
Doesn’t snag or catch on clothing
More affordable than round cuts

#3. 0.76 Carat Intense Blue Radiant Cut Diamond by Blue Nile – Editor’s Choice

Specifications: 

  • Carat Weight: 0.76 carats
  • Shape: Radiant
  • Color: Intense blue
  • Clarity: VS1
  • Polish: Very good
  • Measurement: 5.28 x 4.58 x 3.38 mm

This next selection from Blue Nile boasts of its impressive radiance and durability. The 0.76-Carat Intense Blue Radiant Cut Diamond is one of the most brilliant and vivid blue diamonds on this list. It combines the finest elements of a round brilliant-cut diamond and emerald cut. Colored diamonds with an ‘intense’ color grade feature a lighter tone, with relatively stronger color saturation. 

Stylish and elegant, this blue diamond is a cross between the cushion and princess cut. They are quite rare and can be tough to find in jewelry stores. What makes it unique is its deep cut that maximizes the color refraction, making it surprisingly brilliant.

This radiant-cut blue diamond comes with plenty of facets on its pavilion and crown. Each facet’s precision cuts delivers immense fire and brilliance, surpassing other diamond shapes. Due to its carefully beveled corners, this diamond offers substantial durability against breakage and chips. So, if you do plenty of hands-on work, this radiant-cut diamond makes a great choice for your engagement ring.

ProsCons
Hides inclusions and color tints very well
It may look smaller than it is
Does not have sharp, pointed edges
Quite rare
Brighter than other diamond cuts
Doesn’t catch on clothes and hair
ALSO READ:  Top 5 Best Princess Cut Diamond Rings | 2021 Reviews

#4. 0.45 Carat Fancy Blue Radiant Diamond by James Allen

0.45 Carat Radiant Diamond

Specifications: 

  • Carat Weight: 0.45 carats
  • Shape: Radiant
  • Color: Fancy blue
  • Clarity: SI2
  • Polish: Very good
  • Measurements: 4.44 x 4.13 mm

This radiant-cut fancy blue diamond is one of the most lustrous and radiant blue diamond you’ll ever see. The 0.45 Carat Fancy Blue Radiant Diamond from James Allen has a very classy yet modern appearance. When mounted on vintage costume rings, this gem will stand out from the crowd, giving this ring a one-of-a-kind impression. 

For those looking for diamonds that appear larger amidst low carat weight, this is a suitable option. Its diagonal measurement can trick the eye, making it look larger than a round brilliant-cut with the same carat weight. Also, if you want a fancy-colored diamond that can withstand your day-to-day activities, you may find this gem more durable due to its beveled corners, preventing it from breaking and chipping. 

ProsCons
Stands out when mounted on engagement rings
Seldom to find in jewelry shops
Less possibility of chipping and breakage
Brings out its bright, fancy blue color
Very durable

#5. 1.01 Carat Light Blue Pear-Shaped Diamond by Blue Nile

Specifications: 

  • Carat Weight: 1.01 carats
  • Shape: Pear-shaped
  • Color: Light blue
  • Clarity: VS1
  • Polish: Excellent
  • Measurement: 8.09 x 5.16 x 3.28 mm

Despite its weak saturation level, the 1.01-Carat Light Blue Pear-Shaped Diamond by Blue Nile offers an understated brilliance like no other. A combination of marquise and round brilliant-cut, this light blue diamond features the best qualities of these two shapes while retaining its unique signature cut. This gem is a fitting choice for those who fancy vintage jewelry with a touch of modern style. 

Although this blue diamond has a light blue shade, cutting it in a pear shape will showcase its blue color by giving it a stronger hue. Most people are not a fan of pear-shaped diamonds since most varieties have very poor cuts. However, if you turn to reputable jewelers, you can find a perfect teardrop-cut diamond for your ring setting. 

This pear-shaped fancy blue diamond comes with a rounded end and pointed tip on the other. When mounted on blue diamond engagement rings, this gem can give off an unparalleled shine and absolute blue color.

ProsCons
A unique and unconventional choice
Tends to have inclusions, tints, and blemishes
Very versatile in several ring settings
May tend to hide its brilliance
Very affordable than other cutsIt may include a bowtie effect
Elongates shorter fingers
Rare to find
Ideal for vintage rings

#6. 0.26 Carat Fancy Light Blue Radiant Diamond by James Allen

Specifications: 

  • Carat Weight: 0.26 carats
  • Shape: Radiant
  • Color: Fancy light blue 
  • Clarity: VS2
  • Polish: Very good
  • Measurement: 3.38 x 3.47 mm

A classic beauty, 0.26 Carat Fancy Light Blue Radiant Diamond by James Allen has a stronger saturation and a slightly darker tone than a light blue diamond. Among all the selections in this list, this fancy light blue diamond has the most modern appearance. It appears classy and contemporary at the same time. 

This blue diamond is a fitting choice if you prefer a diamond with a larger impression and a very sparkly luster. They are also more suitable for different ring settings due to their beveled corners and durable structure. Also, its sharp corners are not prone to snag and chips. You may consider this gem for those who have a busy and active lifestyle. 

Compared to round brilliants, this diamond shows off a more blue color. Although it has a fancy blue color, you can still notice its subtle blue shade. 

ProsCons
Stands out on any ring settings
Its extra depth may look smaller when viewed above
Less prone to breakageRare to find
Highly radiant

#7. 0.33 Carat Gray-Blue Pear-Shaped Diamond by Blue Nile

Specifications: 

  • Carat Weight: 0.33 carats
  • Shape: Pear-shaped
  • Color: Gray-blue
  • Clarity: SI1
  • Polish: Very good
  • Measurement: 5.82 x 3.74 x 2.54 mm

While a pear-shaped diamond is not a well-known shape, this properly cut pear-shaped diamond from Blue Nile is truly a great find. The 0.33-Carat Gray-Blue Pear-Shaped Diamond provides a strong gray-blue color that will never go unnoticed.

This fancy light blue diamond has an exquisite blue color, perfect for vintage-style rings. It combines beauty and sophistication that doesn’t appear too over the top. Plus, it is quite rare to find a pear-shaped diamond with an excellent cut. Since it came from Blue Nile, you can guarantee that it will provide you the color and brilliance you prefer. 

A properly-cut pear-shaped blue diamond like this one is suitable for various settings. They look perfect when mounted in vintage settings while giving it a sleek, modern appearance. For those who have short, stubby fingers, this gem is the perfect pick for you.

The best setting for this gray-blue diamond is intricate halo settings and tapered solitaire settings. Ensure that the setting protects the most vulnerable parts of the diamond while retaining its unique appearance of the teardrop shape. 

ProsCons
A unique center stone for engagement rings
The pointed edge is vulnerable to chipping and breakage
Looks great on short and stubby fingers
Tends to have a bowtie effect
Ideal for classy, vintage costume rings
More affordable than other shapes

#8. 0.30 Carat Light Blue Marquise Cut Diamond by Blue Nile

Specifications: 

  • Carat Weight: 0.30 carats
  • Shape: Marquise
  • Color: Light blue
  • Clarity: SI2
  • Polish: Good
  • Measurement: 7.04 x 3.48 x 2.19 mm

Truly magnificent, this 0.30-Carat Light Blue Marquise Cut Diamond from Blue Nile provides a very impressive and distinct appearance. Although this gem almost looks colorless, this blue diamond has a faint blue color, emitting a very special beauty that other colored diamonds don’t have. 

Once this light blue diamond is mounted on any jewelry setting, it gives off a touch of colorful halo with a lively blue shade. It has a boat-shaped appearance, giving the gem a truly unique and vintage statement. Despite its shallow cut, this diamond maintains a decent fire and brilliance on a ring setting.

For those who plan to get a vintage costume ring, this light blue marquise-cut diamond is a great choice, especially if you are not a fan of round brilliant or cushion cuts. 

ProsCons
Hide flaws and inclusions wellHas very vulnerable edges
Adds length to short fingers
Slight bowtie effect
Very versatile shape
Quite delicate
Sparkles beautifully
ALSO READ:  Top 8 Best Diamond Necklaces | 2021 Reviews + Guide

#9. 0.25 Carat Fancy Blue Round Diamond by Blue Nile

Specifications: 

  • Carat Weight: 0.25 carats
  • Shape: Round
  • Color: Fancy blue
  • Clarity: SI1
  • Polish: Very good
  • Measurement: 3.98 x 4.03 x 2.47 

Among other gems, this fancy blue round diamond is the best for engagement rings. Round blue diamonds are known for their exceptional beauty. They can reflect light to your eyes in the most magnificent ways. For those who prefer classic solitaire settings, this gorgeous gemstone is a great pick.

Fancy blue diamonds are quite precious and often considered as extreme rarities among other fancy colors. This gem has an exquisite light blue appearance that mimics the color of the sky. It also gives off the most sparkle among other diamond shapes. A round cut does a good job of highlighting a diamond’s pure luster, making it an absolute eye-catching gem. 

Since round diamonds are considered versatile, you can mount them with almost any setting without compromising their color and brilliance. 

ProsCons
Goes well with other jewelry typesMost expensive among diamond cuts
Very stunning and versatile
Unmatched sparkle

#10. 2.01 Carat Light Blue Radiant Cut Diamond by James Allen

2.71 Carat Radiant Blue Sapphire

Specifications: 

  • Carat Weight: 2.01 carats
  • Shape: Radiant
  • Color: Light greenish blue
  • Clarity: VVS1
  • Polish:  Very good
  • Measurement: 7.14 x 6.90 x 4.46 mm

Another marquise-cut blue diamond secured the last spot for this review. The 2.01-Carat Light Greenish Blue Radiant Cut Diamond by James Allen has a straight blue color with a green-blue secondary color. This gem creates an illusion of greater size due to its long and narrow shape, giving off a noticeable green-blue color. Its elongated form can flatter the wearer by making the finger look slimmer and longer. 

The combination of green and blue come in all intensities when it comes to blue diamonds. However, this Blue Nile gem has a fancy light bluish-green color with blue as the dominant and most noticeable color. 

Another great feature about this gem is that it comes with two carats, a rare size for a fancy blue diamond sold on the market. For those who prefer a larger blue diamond on their jewelry, this 2.01-carat blue diamond is a great candidate for your jewelry collection.

ProsCons
Very noticeable when mounted in ring settings
Very expensive
Unique, vintage shape

Top Pick for Best Blue Diamonds: 0.72-Carat Intense Blue Round Diamond by Blue Nile

Blue diamonds are the rarest and most valuable and expensive fancy color diamonds with a decreasing supply and increasing diamond. Although prices seem to increase every year, blue diamonds have only become more popular among collectors and investors who want to get their hands on these natural wonders.

A blue diamond is a real diamond variety with an exquisite blue tone. They come in a range of colors from light blue to deep blue. Most of the time, they have hints of secondary hues, like green, gray, and gray. Natural blue diamonds are not enhanced or treated to obtain their color.

While this buying guide tackled some of the blue diamond loose stones in different cuts and color intensities, the 0.72-Carat Intense Blue Round Diamond by Blue Nile is the top pick for the best blue diamonds.

If you want a center stone for your jewelry piece that looks classy and timeless, this gem is your best choice. Round blue diamonds like this one offer the most exquisite beauty and brilliance. What’s great about loose diamond stones is that it is fashioned with one of the most popular cuts for diamonds. A round brilliant does a very good job of reflecting light while giving off superior luster than other shapes.

This round blue diamond has a well-cut shape, making it an eye-catching gem when mounted in any jewelry setting. It also features an excellent amount of radiance and fire that contributes to its intense character and beauty. Plus, finding an intense blue diamond can be a rare feat. So, if you want a diamond with vivid blue color, you might as well grab on to this offer.

 With its classy and sophisticated look, this blue diamond gem complements a wide range of styles, from vintage engagement rings, modern round-cut diamond rings, pavé setting, three-stone rings, and more. It also makes a great heirloom since round cut diamond rings is a timeless style that you can treasure and pass down for generations.


Best Brands for Blue Diamonds

These days, getting tricked into buying a fake diamond is inevitable. You can find fraud jewelers almost everywhere, ready to pawn on you in the most unpleasant ways.  It is strongly advised to buy a blue diamond from a jeweler who provides high-quality gems at the best value and price. 

Blue Nile and James Allen are two of the top online diamond jewelry retailers that offer the best prices and customer experience in the fancy-colored diamond market. Discover their expertise below when it comes to diamonds.

Blue Nile

Blue Nile stands among the market-leading retailers of diamond jewelry worldwide. The company started in 1999 when its founder, Mark Vadon, discovered the need to innovate the diamond jewelry business. Using an online business model, Mark Vadon acquired a jewelry website called Internet Diamonds and established a new online jewelry brand named Blue Nile. 

Since then, Blue Nile has revolutionized the jewelry business by allowing customers to shop for unique, high-quality diamonds at excellent value and price. The company believes that buyers deserve straightforward information, more choices, and professional customer service. They built a jewelry empire with the most passionate diamond jewelry experts and artisans. 

Today, Blue Nile takes pride in its large online inventory of fine jewelry, including diamond engagement rings, wedding rings, and anniversary gifts. It has served more than two million clients on its website, where they offer ethically-sourced diamonds mounted in handcrafted settings with timeless and quality designs.

James Allen

James Allen ranks as the top online diamond jewelry website for engagement rings and fine jewelry sales. They are best known as a diamond bridal jewelry company with a massive jewelry collection, well-prized diamonds, and high-tech viewing technology. 

The company started in 2006 after four of its founders merged their talents and expertise to build an online jewelry brand called JamesAllen.com. With its unprecedented global acceptance, it didn’t take long for the brand to become the largest privately-held jewelry retailer worldwide. The company’s main mission is to provide the best quality diamonds and fashionable jewelry collections at the best price. 

Today, James Allen uses a high-tech image display called 360° Diamond Display Technology, where they exhibit over 200,000 handpicked and conflict-free diamonds in a 3D magnified imagery. Due to this innovation, James Allen has gained the industry’s leading diamond suppliers’ attention, allowing the company to get the first pick of the diamond selections. 


Features to Consider When Buying Blue Diamonds (Buyer’s Guide)

Given the lack of a standard grading system for blue diamonds, it is crucial to know what to look for when buying diamond jewelry. 

Color

Color is the most dominant factor when buying a colored gemstone. A blue diamond owes its color to the presence of an impurity known as boron. The higher concentration of boron, the deeper its blue color. Blue diamonds have a wide range of shades, including straight blue, violet-blue, greenish-blue, and grayish-blue.

Carat

Besides color, carat is another essential factor when determining a blue diamond’s value. The larger the size of a blue diamond, the higher you pay per carat.

Clarity and Luster

Clarity is not entirely significant for blue diamonds than it is for colorless diamonds since inclusions in colored diamonds are slightly difficult to notice. The fewer the external flaws, inclusions, and blemishes, the higher the clarity and price. 

A blue diamond is considered a Type2 gemstone with fewer inclusions. Still, it is advisable to choose blue diamonds graded with SI1 to SI2 or Type1 variety that are eye-clean.

Color Enhancements

Natural blue diamonds are a rare find. That is why treated blue diamonds are very common to achieve a bluish color. However, these enhancements do not affect a diamond’s structure. Light blue diamonds are often treated to acquire darker hues. 


Conclusion

Blue diamonds are unique, gorgeous, and valuable gemstones. They are luxurious, prestigious, and beyond the reach of the average diamond budget. If you’re lucky enough to own a blue diamond, you can use it as a center stone for a classy engagement ring. You can also find synthetic and treated blue diamonds if you want a budget-friendly option. 

Blue diamonds are one of the most sought-after fancy-colored diamonds among other varieties. Not only are they rare, but their quality factors, including hue, saturation, and tone, are top-notch. As a result, they are seen as highly valued gems, especially among collectors and investors. 

Among all the blue diamond selections in this article, the 0.72-Carat Intense Blue Round Diamond by Blue Nile is the top pick for the best blue diamonds. This gem is a great choice if you want a classy and timeless looking center stone for your jewelry piece. Its round brilliant-cut does a great job of highlighting its beauty and brilliance.

This loose gem is very versatile since you can easily mount it in any jewelry setting. It reflects the light well while exhibiting its fancy blue shade. Its well-cut shape helps in giving off an excellent amount of radiance and fire. With its classy and sophisticated look, this blue diamond complements a wide range of styles, from vintage engagement rings, modern round-cut diamond rings, pavé setting, three-stone rings, and more. 

Beyond its breathtaking beauty and skyrocketing value, blue diamonds instill a special charm and uniqueness that gives you more reasons to choose it as an engagement ring for your beloved.


FAQs (Frequently Asked Questions)

Are blue diamonds an excellent choice for engagement rings?

Blue diamonds are extremely scratch-resistant and durable, making them a perfect center stone for everyday jewelry. Its fire and brilliance cannot be compared to other blue gemstones. Not only that, blue diamonds have a symbolic significance that represents loyalty, sincerity, and faithfulness – the greatest values that a relationship requires. 

Another great thing about blue diamonds is they add prestige and value to an engagement ring. Although getting a natural blue diamond engagement ring can be very expensive, you may opt for budget-friendly options, such as lab-grown and treated blue diamonds. They are affordable alternatives with hardly any noticeable difference from a natural blue diamond.

What is the difference between a blue diamond and a blue sapphire?

Although most people compared blue diamonds to sapphires, these two stones have separate qualities in terms of durability, rareness, sparkle, and chemical composition. Blue diamonds have a perfect rank of 10 on the Mohs scale, while sapphire comes second, ranking at nine. 

Second, blue diamonds are extremely rare than sapphires. They also have greater sparkle and brilliance that sapphire cannot match. Not only that, sapphires are made from corundum, while diamonds are a combination of hydrogen, nitrogen, and boron. 

Regardless of what you choose, choosing the best blue gem is entirely dependent on your preference and budget. However, if you are looking for superior brilliance and sparkle, blue diamonds are a fitting choice.

What is a synthetic blue diamond?

A synthetic blue diamond is a great alternative to natural blue diamonds. They also have the same chemical structure as a naturally occurring diamond, but the only apparent difference is they are created inside a gemological lab. 

Synthetic diamonds offer several benefits, especially for those on a budget. They are 20% to 50% less expensive and eco-friendly, with a lower chance of affecting the environment. You can also guarantee that they are ethically-sourced. Although lab-created diamonds don’t have the same value as natural diamonds, they make a beautiful and practical choice.

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