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0.4 carat radiant cut diamond ring Buying Guide

Discover the exact steps to ensure that you retain $816 in your pocket by utilizing our comprehensive guide.
In this guide, we will show you how to get the most out of your purchase of a 0.4 carat radiant cut diamond ring. We will tell you where it's worth spending more money and where you can cut costs, and provide you with information on where to find your perfect ring or maybe even something even more amazing.
Ready to shop without learning?
We have gathered the most affordable deals on 0.4 carat radiant cut diamond rings from top online platforms. You can check out our carefully selected options in the linked section.

Diamond Price Guide Overview
8 buying lessons - 5-10 min total read time

Grab the lowest price for a luxury 0.4 carat radiant cut diamond ring.

In the upcoming lessons, we will teach you how to save a substantial amount of money while still being able to afford a stunning 0.4 carat diamond ring with a radiant cut. Our lessons will guide you on maximizing your budget and help you steer clear of deceptive tactics employed by diamond companies.
Average Price
$772.00
Price Range
$450-$1,470
Our Max Savings
$816
Lessons 1-4  ∴  Save Money 
Lessons 4 & 5  ∶  Spend Money 
Lessons 6-8  ∴  Personalize & Decide 
⤫ 40% Cash Savings

Lesson 1

Buying Online

Diamond rings purchased online are much cheaper compared to traditional retail stores. In fact, retail stores can be 40% more expensive and offer a limited selection of options.
$730 Cash Savings

Lesson 2

Clarity

Our tips on clarity can help you cut diamond ring prices in half. We're here to assist you in saving a substantial amount.
$150 Cash Savings

Lesson 3

Color

The color of a diamond has a big impact on its price. We're here to help you understand how and when you can use this factor to save money.
⤫ 85% Cash Savings

Lesson 8

Lab Grown

Opting for lab-grown diamonds can significantly reduce your expenses by up to 85% when purchasing a 0.4 carat radiant cut diamond ring. However, selling it later on may pose some challenges.
☺ Spend Money

Lesson 4

Carat Weight / Size

Most women tend to prefer diamonds that appear larger, so it's a good idea to prioritize your budget towards that. We're here to assist you in achieving a bigger size without overspending in other aspects.
☺ Spend Money

Lesson 5

Cut, Sparkle & Brilliance

The diamond's cut plays a significant role in its overall appearance. It's important not to compromise on this aspect since it's what gives the diamond its sparkle and makes it truly noticeable.
≔ Personalize

Lesson 6

Shapes

Each shape of a diamond ring has its own distinct appearance and sparkle. We are here to assist you in understanding the characteristics and brilliance of each shape.
≔ Personalize

Lesson 7

Setting / Band

Choosing a solitaire ring can be a cost-effective option and create the illusion of a larger diamond. However, it's important to take personal preference into account when making this decision.

Lesson 1 - Buy Online
Up to 40% savings here

Instantly lower the price of your online purchase for a 0.4 carat radiant cut diamond ring by up to 40%.

Consider this: purchasing your engagement ring online. Websites such as Blue Nile and James Allen provide significant discounts, reducing prices by up to 40% compared to physical stores. Additionally, you'll have access to a wider range of options and customization features. This way, you can find the ideal ring that suits both your preferences and budget.

To begin creating the most affordable and valuable 0.4 carat radiant cut diamond ring, simply click on the 'shop now' links provided below!

Are you ready to start shopping? Our links will directly lead you to the best deals on high-quality diamonds from reputable online diamond retailers.

Our Money Saving Links

Watch us compare pricing with retail stores and our favorite online brands

Ease of Use
Pricing
Selection
Customer Service
Best overall experience, great selection, 24/7 customer support
Ease of Use
Pricing
Selection
Customer Service
Another excellent website for very well priced diamond rings.
Ease of Use
Pricing
Selection
Customer Service
They focus on ethically sourced diamonds. Best option for karma free rings
Ease of Use
Pricing
Selection
Customer Service
They focus on ethically sourced diamonds. Best option for karma free rings
Ease of Use
Pricing
Selection
Customer Service
Mostly here to show you how retail companies are not high quality. 

Lesson 2 - Clarity

When shopping for a 0.4 carat radiant cut diamond ring, the diamond's clarity is the major factor that affects its pricing.

⊗ Up to $1,032 savings with these tips
Watch us save thousands of dollars by simply selecting the right clarity range.

What is Clarity?

In America, clarity refers to the presence of noticeable flaws in a diamond. But it's important to note that these flaws are usually only visible when using a 10x magnifying glass. Diamond clarity is categorized from 'flawless' to 'included'. In between, there are classifications like VS1, VS2, and SI1. These diamonds may have flaws that can only be seen with 10x magnification. To the naked eye, they look completely clear, so nobody will notice any imperfections when they admire your ring!

Optimal Clarity Range for a 0.4 carat radiant cut diamond ring

Choosing a 0.4 carat radiant cut diamond ring can result in significant savings, up to $1,032, if you opt for a diamond within the VS2-SI1 clarity range. When it comes to striking a balance between price and clarity, we highly recommend considering diamonds in the VS2 category. However, it is important not to disregard SI1 diamonds altogether. By dedicating a few minutes to carefully sift through the available options, you can uncover SI1 diamonds that possess a flawless appearance.

One more important tip! Always avoid "cloudy"

This one is simple. Always avoid cloudy diamonds found in the GIA certificate. This is the one flaw that really matters for brilliance. 
☆ These diamonds have identical carat, cut, & color 
Not Recommended
Go with this clarity
FL
IF
VVS1
VVS2
VS1
VS2
SI1
‹ drag left or right ›

FL - Flawless

Cost - $1,617 This diamond is flawless, but it feels like it's too much considering the price. Savings - You could save $875 - $1,167 with a VS2, SI1, or SI2 diamond
‹ drag left or right ›

IF - Internally Flawless

Cost - $1,470 This diamond is perfectly clear inside without any flaws, but it might have some imperfections on the outside. Even these imperfections seem unnecessary. Savings - You could save $728 - $1,020 with a VS2, SI1, or SI2 diamond
‹ drag left or right ›

VVS1

Cost - $1,470 This diamond is almost flawless, but considering its price, it's still excessive indulgence. Savings - You could save $728 - $1,020 with a VS2, SI1, or SI2 diamond
‹ drag left or right ›

VVS2

Cost - $1,360 These diamonds are really nice, but we suggest going for a lower clarity. Savings - You could save $618 - $910 with a VS2, SI1, or SI2 diamond
‹ drag left or right ›

VS1 - Very Slightly Included

Cost - $849 If you happen to come across a really good offer for a VS1, that's definitely a bonus. However, if you're looking for the best combination of price and quality, it would be wise to consider one of the clarity levels that follow. Savings - You could save $107 - $399 with a VS2, SI1, or SI2 diamond

‹ drag left or right ›

VS2 - Very Slightly Included

Cost: $742 Total Savings: $107 - $728 If you're looking for the best bang for your buck, then look no more than this diamond clarity. Most of these diamonds will look flawless to you because their imperfections are invisible to the naked eye.
‹ drag left or right ›

SI1 - Slightly Included

Cost: $585 Total Savings: $264 - $885 This is the best option for diamond clarity at an incredibly affordable price. It's important to note that not all SI1 diamonds are the same. While some may not live up to your expectations, there are many that are absolutely stunning and could even be mistaken for a higher quality VS2 diamond.

Lesson 3 - Color

The color you choose for a 0.4 carat radiant cut diamond ring significantly affects its price.

⊗ Up to $218 savings with these tips
Watch us save thousands by purchasing diamonds in the right range

What is Color?

Diamonds can vary in color, ranging from yellow to colorless. The Gemological Institute of America (GIA) rates diamonds on a scale from D (colorless) to Z (yellow or brown). The majority of diamonds used in jewelry have a slight color, falling within the G-H range. These subtle color tones are usually only noticeable when compared to higher grade diamonds like D, E, or F. While color is more noticeable in larger diamonds, a radiant diamond from the G-H range will still appear almost colorless and will be less expensive than a completely colorless D-grade diamond.

Optimal Color Range For A 0.4 Carat Radiant Cut Diamond Ring

Choosing the appropriate color grade for a 0.4 carat radiant cut diamond ring can lead to significant cost reductions. Instead of paying higher prices for diamonds graded D-F, consider opting for a diamond within the G-J range. This decision can still result in a breathtaking piece while saving you up to $218, in addition to any potential savings derived from wise choices regarding clarity. For more elaborate designs such as a halo diamond ring adorned with numerous smaller diamonds encircling the main stone, it is advisable to select a central diamond within the G-H color range. This approach helps prevent any noticeable color contrast that may arise when comparing I-J graded diamonds to the typically colorless or nearly colorless diamonds in the halo.
Clearest Color
Best Value
Sometimes Ok
D
E
F
G
H
I
J
< drag left or right >

D color

Cost - $702 This diamond is colorless, meaning it has no hints of yellow, you can find these at a good price, but it is not as common. Savings - You could save $119 - $154 with a G or H colored diamond
‹ drag left or right ›

E color

Cost - $660 An E color diamond is a rare, colorless gem of exceptional beauty and value. You can sometimes find them at a great price. Savings - You could save $77 - $112 with a G or H colored diamond
‹ drag left or right ›

F color

Cost - $620 These are near-colorless with only slight traces of color, making it an attractive choice. You'd really have to look closely to figure it out Savings - You could save $37 - $72 with a G or H colored diamond
‹ drag left or right ›

G color

Cost - $583 These are near-colorless with only slight traces of color, making it an attractive choice for it's quality and price. You'd really have to look closely to notice any color Savings - You could save $35 with an H colored diamond
‹ drag left or right ›

H color

Cost - $548 Total Savings: $35 - $154 These are near-colorless with only slightly more noticable hint of color, further making it an attractive choice for it's quality and price. You'd need to have a trained eye to see the color flaw in this one without having a colorless diamond next to it.
‹ drag left or right ›

I color

Cost - $515 Total Savings: $68 - $187 These begin to have a bit more noticable hint of color especially when next to colorless diamonds. These still have unnoticable color if placed on a solitaire ring, but we do not recommend these on a halo ring.
‹ drag left or right ›

J color

Cost - $484 Total Savings: $99 - $218 These also have a slightly more noticable hint of color especially when next to colorless diamonds. These still have unnoticable color if placed on a solitaire ring, but we do not recommend these on a halo ring.

Lab Grown Diamonds

Lab grown diamonds can often cut prices in half and no one will ever notice the difference. 

Lesson 4 - Lab Grown
Save up to 85% on your diamond ring.

Save up to $600 on your 0.4 carat radiant cut diamond ring by opting for a lab grown diamond.

Lab-grown diamonds are the result of scientific processes that create diamonds that appear identical to those found in nature. These lab-grown diamonds are produced in a way that is more environmentally friendly and morally responsible. Compared to naturally occurring diamonds, they are more readily available, making them much more affordable to purchase. In fact, a lab-grown diamond can be up to 85% cheaper than a similar diamond found in nature. The main advantage of lab-grown diamonds is that they offer the opportunity to acquire a diamond of superior quality at a significantly lower cost. This not only reduces the financial burden upfront but also lessens the impact on one's finances, even if selling the diamond later on is not an option.

If you ever decide to sell your 0.4 carat radiant cut diamond ring, choosing a lab-grown diamond can help minimize your financial loss.

Choosing the appropriate color grade for a 0.4 carat radiant cut diamond ring can lead to significant cost reductions. Instead of paying higher prices for diamonds graded D-F, consider opting for a diamond within the G-J range. This decision can still result in a breathtaking piece while saving you up to $218, in addition to any potential savings derived from wise choices regarding clarity. For more elaborate designs such as a halo diamond ring adorned with numerous smaller diamonds encircling the main stone, it is advisable to select a central diamond within the G-H color range. This approach helps prevent any noticeable color contrast that may arise when comparing I-J graded diamonds to the typically colorless or nearly colorless diamonds in the halo.
Explore Lab Grown 

Lesson 5 - Carat / Size

Focus your money on carat weight when you are shopping for a diamond ring.

Why is Carat Important?

Imagine a diamond ring for a moment. What stands out the most? It's definitely the size of the main diamond! Women agree on this - surveys show that size is the most important factor. That's why our budget recommendation is straightforward: pay attention to the carat weight, which directly determines the size.
Watch us compare sizes and help you visualize what you want. 

When shopping for a radiant cut diamond ring with a weight of 0.4 carats, choose from this range of carat options.

It's a wise choice to consider diamonds in the 0.36 to 0.44 carat range. This way, you'll find a good variety of prices without needing to go for a significantly larger size.
Hand Diamond

1 carat

Explore More Diamond Weights

Lesson 6 - Cut

The cut of a diamond is what gives it that special sparkle. When buying your 0.4 carat radiant cut diamond ring, make sure to choose an ideal or excellent cut.

Find out why cut makes diamonds sparkle and why you want ideal or excellent cut diamonds.

What is Cut?

The secret to an amazing 0.4 carat radiant cut diamond ring lies in how the diamond is cut. It all comes down to the precise shaping of the diamond's facets, which directly affects how it sparkles and shines.

A hidden truth within the diamond industry

Many people assume that an 'Ideal' cut diamond, which is praised for its ability to sparkle brilliantly because of its perfect proportions, will always cost the most. However, this isn't always the case. In some situations, a 'Fair' cut diamond with the same carat, color, and clarity can actually be more expensive. This is because poorly cut diamonds may appear larger, but they lack the stunning sparkle and brilliance that you're looking for. A diamond that lacks sparkle is similar to a clock without hands.

Remember this final advice: stick with GIA Certified Excellent Cut Diamonds (commonly called "Ideal" Cut).


Never Buy These
Definitely Buy These
Fair
Good
Very Good
Ideal
Excellent
‹ drag for sparkle ›

Fair Cut Diamond

Look at that dull sparkle... not much to write home about. Stay away from these.
‹ drag for sparkle ›

Good Cut

Still pretty bland in the sparkle area... stay away from these. 
‹ drag for sparkle ›

Very Good Cut

Getting better, but you don't save much money to  
‹ drag for sparkle ›

Ideal Cut

The is as low as you should go
‹ drag for sparkle ›

Excellent Cut

Blue Nile calls it Astor, James Allen calls it True Hearts, and Brilliant Earth calls it Truly Brilliant. 

Regardless, excellent cut diamonds have incredible sparkle.

Lesson 7 - Shape

The sparkle of a diamond can vary based on its shape, and certain shapes can make 0.4 carat radiant cut diamond rings appear more expensive.

What is Diamond Shape?

The diamond's style is all about its shape, you know, like round, oval, or radiant. Certain shapes can make the diamond look bigger, while others make it shinier and more elegant. You should totally check out our shape tool in this section, where you can explore a bunch of 0.4 carat diamond rings with all sorts of cool shapes.

What shape to choose?

Sure, some diamond shapes can make the stone look bigger, and some shapes are popular right now. But remember, what really counts is what makes you the happiest. If you're not sure, a brilliant cut diamond, such as Round, Marquise, Princess, Cushion, Oval, Pear, and Radiant shapes, might be your best bet. Out of these, Round diamonds are the most popular, while Oval and Marquise shapes can give the impression of a larger diamond without weighing more.
Watch us compare shapes so you can see exactly what style you prefer. 

Explore other diamond shapes

Try out different diamonds

Hand Diamond
Round
Marquise
Princess
Emerald
Cushion
Oval
Pear
Asscher
Radiant
Heart

Lesson 8 - Setting

The band can really change the way a 0.4 carat radiant cut diamond ring looks.

What is setting?

The part of the diamond ring that holds the diamond, known as the band, is what we call the setting. Usually, these are made out of gold and come in different colors like white, yellow, or pink gold. You also have the option to choose a platinum band. The setting plays a significant role in how the 0.4 carat radiant cut diamond ring looks. It gives you the opportunity to add your personal style. We have listed the three most popular settings for you. No matter which one you choose, it's important to always go with 14k gold. As you keep reading, you'll understand why this is the best choice.
The setting or band is really important for making your diamond look bigger and better. 

Choose 14 karat gold as the material for your band.

Here's a crucial rule to follow. Avoid choosing 18k or 24k gold for your setting. It's better to opt for 14k gold. Despite 18k and 24k gold being more pure, they are considerably softer and prone to bending. If the setting that secures your valuable diamond bends excessively, the chance of the diamond becoming loose and falling out rises significantly. Numerous individuals have faced this issue.

Solitaire Setting - A Slim Band Accentuates the Look of a Larger Diamond

In surveys, the majority of women indicate a preference for a big diamond. If you want to make a 0.4 carat radiant cut diamond ring appear larger in size, consider using a Solitaire setting with a slim and stylish band. The difference between the understated band and the substantial diamond can create the optical illusion of a bigger stone. Adding accent diamonds along the band can also enhance this effect, giving a hint of allure without overshadowing the main diamond.

Halo: Make Your Diamond Look Bigger with a Collection of Small Stones

A halo style can be a fantastic option to make your 0.4 carat radiant cut diamond ring appear larger. This design involves surrounding the main stone with smaller diamonds, which creates a radiant aura that enhances the size of the central diamond. If you want to create an even grander illusion, you might want to consider a double halo style. When paired with a slender band, this type of setting can give the impression of a larger diamond, resulting in a truly remarkable piece.

The main diamond should be the focal point.

Many ladies prefer a diamond that appears large. If your ring's band is too fancy or wide, it might take away attention from the diamond and make it seem smaller. If you want to emphasize your 0.4 carat radiant cut diamond ring, it's better to choose a simple band that won't overshadow it. However, if you find the overall design of the ring more appealing, then a detailed band may be what you're seeking. Just keep in mind that it could diminish the diamond's sparkle.

Build a Custom 0.4 carat radiant cut diamond ring Starting with Our Curated Diamond Selections For The Best Deals

Crafting a customized piece is a personal endeavor, offering the opportunity to design a jewelry item that truly showcases your individual taste and personality, all at a price that is much more affordable than typical store prices. With renowned leaders in the industry such as Brilliant Earth, James Allen, and Blue Nile, you are given the flexibility to personalize every aspect of your ring, from the diamond's shape to the band's design.
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Watch us take you through the entire building process on our favorite websites.

Feel free to make your purchase online from our reliable partners. Each link will lead you to the best deal available for a diamond ring.

We have thoroughly examined each company and made sure that every "Shop Now" link is set up to direct you to the most competitive prices for high-quality diamonds. This means that we have individually adjusted the settings on each website to assist you in finding the greatest savings on your purchase. Enjoy a diverse selection, personalized rings, and unparalleled customer assistance to enhance your shopping experience.

Our Money Saving Links

Watch us compare pricing with retail stores and our favorite online brands

Ease of Use
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Customer Service
Best overall experience, great selection, 24/7 customer support
Ease of Use
Pricing
Selection
Customer Service
Another excellent website for very well priced diamond rings.
Ease of Use
Pricing
Selection
Customer Service
They focus on ethically sourced diamonds. Best option for karma free rings
Ease of Use
Pricing
Selection
Customer Service
They focus on ethically sourced diamonds. Best option for karma free rings
Ease of Use
Pricing
Selection
Customer Service
Mostly here to show you how retail companies are not high quality. 

Virtual Appointment

Let us help you get help by the industry leaders. When you click the button below we will help you choose where to set up your appointment.
Book Appointment

Frequently Asked

Did you want to know even more? Wow you're a great student!

How much is a 0.4 carat radiant cut diamond ring worth?

The average price of a 0.4 carat radiant cut diamond ring is $800. However, the price range for such rings can vary between $450 and $1,470.

How big is a 0.4 carat radiant cut diamond ring?

A 0.4 carat radiant cut diamond ring has a size of approximately 4.7mm in diameter. This makes it slightly smaller than a 0.9 carat radiant cut diamond ring, which has a diameter of around 5.9mm. On the other hand, it appears slightly larger than a 0.1 carat radiant cut diamond ring, which has a diameter of about 3.4mm.

What does a 0.4 carat radiant cut diamond ring look like like on a hand?

A 0.4 carat radiant cut diamond ring has a width of 4.8mm, which means that it takes up 28.3% or slightly over a quarter of the finger's width.

What is the price of a 0.4 carat radiant cut diamond ring?

The price of a 0.4 carat radiant cut diamond ring falls within the price range of $450-$1,470.

Is a 0.4 carat radiant cut diamond ring good enough?

Yes, a 0.4 carat radiant cut diamond ring can be considered good enough. While it may not have the same size and presence as larger diamonds, the radiant cut can enhance its brilliance and sparkle. The quality of the diamond, including its clarity and color, also plays a significant role in determining its overall beauty. Ultimately, it depends on personal preferences and budget constraints.

Is a 0.4 carat radiant cut diamond ring big?

No, a 0.4 carat radiant cut diamond ring is not considered big. The average carat weight for a diamond engagement ring is about 1.2 carats, so a 0.4 carat diamond is significantly smaller. While it may still be beautiful, it will likely appear more delicate and subtle on the finger.

What does a 0.4 carat radiant cut diamond ring weigh?

A 0.4 carat radiant cut diamond ring weighs 0.08 grams.

Should I get a 0.4 carat radiant cut diamond ring?

A 0.4 carat radiant cut diamond ring is a good choice if you prefer a smaller and more affordable option.

Is a 0.4 carat radiant cut diamond ring too big?

A 0.4 carat radiant cut diamond ring is not considered too big.

Is a 0.4 carat radiant cut diamond ring small?

A 0.4 carat radiant cut diamond ring may be considered small compared to larger carat sizes. However, the appearance of the diamond can also be influenced by factors such as the cut, color, and clarity. Additionally, the size of the diamond may appear differently depending on the size of the wearer's finger.
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