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0.4 carat round diamond ring Buying Guide

Using our guide, discover how to save an impressive $704.
This well-crafted guide will teach you how to make the most of your money when buying a 0.4 carat round diamond ring. It gives advice on which aspects are worth spending more money on and which ones can help you save. It also points out exactly where you can find the ring you desire or maybe even a better alternative.
Eager to buy and skip the lessons?
We have carefully selected the best deals on 0.4 carat round diamond rings from top online retailers. Check out our chosen options using the links provided below.

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

Get the lowest price for the highest-grade 0.4 carat round diamond ring.

In the upcoming lessons, we will teach you how to acquire a bigger, shiny 0.4 carat round diamond ring without breaking the bank. Additionally, we will provide guidance on maximizing your budget and avoiding being ripped off by diamond companies.
Average Price
$508.21
Price Range
$340-$1,220
Our Max Savings
$704
Lessons 1-4  ∴  Save Money 
Lessons 4 & 5  ∶  Spend Money 
Lessons 6-8  ∴  Personalize & Decide 
⤫ 40% Cash Savings

Lesson 1

Buying Online

Buying diamond rings online is much more affordable. Retail stores may increase the price by 40% and often have a limited variety in stock.
$710 Cash Savings

Lesson 2

Clarity

Save a significant amount of money by using our clarity advice, which can reduce diamond ring prices by 50%. We are here to assist you in achieving this goal.
$130 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

Lab-grown options can save you up to 85% on a 0.4 carat round diamond ring, but selling it might be a challenge.
☺ Spend Money

Lesson 4

Carat Weight / Size

Typically, women prefer a diamond that appears bigger, so that's where you should focus your budget. We can help you achieve a larger size while also finding savings in other areas.
☺ 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 a unique appearance. We will demonstrate the appearance and characteristics of each shape.
≔ Personalize

Lesson 7

Setting / Band

Opting for a solitaire ring can help you save some money and create the illusion of a bigger diamond. However, it's important to consider your personal preferences as well.

Lesson 1 - Buy Online
Up to 40% savings here

Instantly lower the price of your 0.4 carat round diamond ring online 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.

Click on the 'shop now' links provided below to begin creating your own affordable, high-quality 0.4 carat round diamond ring!

Are you ready to start shopping? Any of our links will take you to the best online diamond companies where you can find affordable, high-quality diamonds from trusted sources.

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

The clarity of the diamond is the most significant aspect to consider when determining the price of a 0.4 carat round diamond ring.

⊗ Up to $845 savings with these tips
Watch us save thousands of dollars by simply selecting the right clarity range.

What is Clarity?

In the world of diamonds, clarity refers to how noticeable any imperfections are. The main focus is on how easily these flaws can be seen, as most of them can only be detected with a 10x magnifying tool. A diamond's clarity can range from 'flawless' (FL) to 'included' (I), with various classifications like VS1 (Very Slightly Included), VS2, and SI1 (Slightly Included) falling in between. These types of diamonds typically have imperfections that can only be seen under 10x magnification. So, to the naked eye, they will appear completely clear – meaning anyone admiring your ring won't have a clue about any flaws!

Optimal Clarity Range for a 0.4 carat round diamond ring

Choosing a diamond in the VS2-SI1 clarity range for your 0.4 carat round diamond ring can result in significant savings, potentially reducing the total price by as much as $845. When considering the clarity options, we highly recommend the VS2 grade due to its favorable combination of price and clarity. However, it's important not to dismiss SI1 diamonds altogether. With just a few minutes of searching through the available diamonds, you can easily find SI1 stones that have an appearance that is virtually flawless.

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 - $1,342 The diamond is perfect, without any flaws, but the price is way too high. Savings - You could save $828 - $851 with a VS2, SI1, or SI2 diamond
‹ drag left or right ›

IF - Internally Flawless

Cost - $1,220 The diamond is flawless on the inside, meaning it has no internal flaws, but it may have some imperfections on the outside. This is also a bit excessive. Savings - You could save $706 - $729 with a VS2, SI1, or SI2 diamond
‹ drag left or right ›

VVS1

Cost - $1,220 The diamond is nearly flawless, but considering its cost, it's still overly expensive. Savings - You could save $706 - $729 with a VS2, SI1, or SI2 diamond
‹ drag left or right ›

VVS2

Cost - $560 These diamonds are really beautiful, but we recommend opting for a lower clarity option since our eyes can't tell the difference. Savings - You could save $46 - $69 with a VS2, SI1, or SI2 diamond
‹ drag left or right ›

VS1 - Very Slightly Included

Cost - $548 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 $34 - $57 with a VS2, SI1, or SI2 diamond

‹ drag left or right ›

VS2 - Very Slightly Included

Cost: $514 Total Savings: $34 - $706 When it comes to both quality and price, you won't find a better deal than this diamond clarity. These diamonds are unmatched in their flawless appearance, making them look absolutely perfect to anyone's eye. There are no visible faults in most of these diamonds, so you can trust that they are of the highest quality.
‹ drag left or right ›

SI1 - Slightly Included

Cost: $497 Total Savings: $51 - $723 This is the absolute best choice if you want a diamond with excellent clarity, and it's available at an amazing price. However, it's important to understand that not all SI1 diamonds are the same. While some might not meet your expectations, many of them are truly stunning and have a similar look to a VS2 diamond.

Lesson 3 - Color

The cost of a 0.4 carat round diamond ring is greatly affected by the color of the diamond you choose.

⊗ Up to $185 savings with these tips
Watch us save thousands by purchasing diamonds in the right range

What is Color?

Diamonds can have a yellow tint or be completely colorless. The GIA grades them from D (colorless) to Z (yellow or brown). Most diamonds used in jewelry are in the G-H range, which means they have a slight color. You can only see this color if you compare them to higher-grade diamonds like D, E, or F. While you can notice color differences more easily in larger diamonds, a round diamond in the G-H range will still appear almost colorless and will be cheaper than completely colorless diamonds like those with a D-grade.

Optimal Color Range For A 0.4 Carat Round Diamond Ring

Selecting the appropriate color grade for a 0.4 carat round diamond ring has the potential to lead to significant cost savings. Instead of paying premium prices for D-F graded diamonds, consider opting for a diamond within the G-J range. By doing so, not only can you still obtain a breathtaking piece, but you can also save up to $185, in addition to any savings achieved through wise decisions regarding clarity. When it comes to more intricate designs, such as a halo diamond ring featuring numerous smaller diamonds encircling the main stone, it is advisable to choose a central diamond falling within the G-H color range. This particular approach helps prevent any noticeable color contrast that might arise when comparing I-J graded diamonds to the smaller, typically colorless or near-colorless diamonds within the halo.
Clearest Color
Best Value
Sometimes Ok
D
E
F
G
H
I
J
< drag left or right >

D color

Cost - $596 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 $101 - $131 with a G or H colored diamond
‹ drag left or right ›

E color

Cost - $561 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 $65 - $95 with a G or H colored diamond
‹ drag left or right ›

F color

Cost - $527 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 $32 - $61 with a G or H colored diamond
‹ drag left or right ›

G color

Cost - $495 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 $30 with an H colored diamond
‹ drag left or right ›

H color

Cost - $466 Total Savings: $30 - $131 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 - $438 Total Savings: $58 - $159 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 - $411 Total Savings: $84 - $185 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 $300 on a 0.4 carat round diamond ring by opting for a lab grown diamond.

Lab-grown diamonds, also known as man-made diamonds, possess the benefit of appearing identical to natural diamonds, while being created through a sustainable and ethical process. Moreover, their affordability is enhanced due to their increased availability compared to natural diamonds. In fact, a lab-grown diamond can cost up to 85% less than a similar natural diamond.

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

Selecting the appropriate color grade for a 0.4 carat round diamond ring has the potential to lead to significant cost savings. Instead of paying premium prices for D-F graded diamonds, consider opting for a diamond within the G-J range. By doing so, not only can you still obtain a breathtaking piece, but you can also save up to $185, in addition to any savings achieved through wise decisions regarding clarity. When it comes to more intricate designs, such as a halo diamond ring featuring numerous smaller diamonds encircling the main stone, it is advisable to choose a central diamond falling within the G-H color range. This particular approach helps prevent any noticeable color contrast that might arise when comparing I-J graded diamonds to the smaller, typically colorless or near-colorless diamonds within the halo.
Explore Lab Grown 

Lesson 5 - Carat / Size

When buying your diamond ring, make sure to prioritize spending on carat.

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. 

Choose this Carat Range for a 0.4 carat round diamond ring while shopping.

You may want to consider looking at diamonds that range from 0.36 to 0.44 carats. This will give you a good idea of prices without a noticeable increase in 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 round 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?

Are you in search of the most stunning 0.4 carat round diamond ring? Just keep in mind that it's the cut, the flawless and meticulous angles of the diamond, that ultimately determine its shine and radiance.

A hidden truth within the diamond industry

In terms of diamond cuts, the 'Ideal' cut is often seen as the most precious one. It's specifically crafted to enhance the brilliance by having flawless proportions. Nonetheless, it might shock you to know that sometimes a 'Fair' cut diamond, despite having the same carat weight, color, and clarity, can actually be pricier. Sounds weird, huh? Well, that's because inadequately cut diamonds might seem bigger but lack the dazzling sparkle and brilliance that you long for. A diamond without sparkle is basically like a boat without water.

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 brilliance of diamonds is influenced by their shape, and specific shapes can contribute to the perceived value of a 0.4 carat round diamond ring.

What is Diamond Shape?

The shape of a diamond defines its style - you can choose from various options like round, oval, and many more. Each shape has its own unique qualities that can make a diamond appear bigger, add extra sparkle, or exude a timeless elegance. In this section, you can use our shape tool to explore a wide range of 0.4 carat diamond rings available in different shapes.

What shape to choose?

It's important to recognize that certain diamond cuts can give off the illusion of a bigger gem, and there are some cuts that are currently in style. Nevertheless, the most important decision is the one that truly speaks to you. If you're unsure about which cut to go for, think about getting a brilliant cut diamond. This includes shapes like Round, Marquise, Princess, Cushion, Oval, Pear, and Radiant. Out of all these options, Round diamonds are the ones that get chosen most frequently, while Oval and Marquise cuts can make a diamond look bigger without increasing the carat weight.
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 greatly change the appearance of a 0.4 carat round diamond ring.

What is setting?

The part of a ring that holds the diamond in place is called the setting or sometimes the band. Usually, these bands are made of gold and come in different colors like white, yellow, or rose. You can also consider platinum bands as another option. The setting plays a big role in how your 0.4 carat round diamond ring looks. It gives you a place to display your style preferences. Here, we've pointed out the three settings that are most popular. No matter which setting you choose, it's always best to go with 14k gold. The reasons for this will become clear as you continue reading.
The setting or band is really important for making your diamond look bigger and better. 

Choose 14K Gold for your band.

Always keep in mind this important advice. Avoid choosing 18k or 24k gold for your setting. Opt for 14k gold instead. Even though 18k and 24k gold are more pure, they are much softer and more prone to bending. If the setting that holds your precious diamond bends, there is a higher chance of the diamond coming loose and falling out. This is a problem that is commonly encountered.

Solitaire - A Delicate Ring Enhances the Size of the Center Diamond Significantly

Surveys indicate that the majority of women desire a big diamond. To highlight the visual size of a 0.4 carat round diamond ring, imagine a setting with a thin, delicate Solitaire band. The contrast between the small band and the substantial diamond can give the impression of a larger gemstone. To enhance this effect, think about settings that include small accent diamonds along the band. They add a decorative touch without overshadowing the main diamond.

Halo: Enhance Your Diamond's Size with Small Diamonds

To make your 0.4 carat round diamond ring appear bigger, you might want to think about using a halo setting. The small diamonds surrounding the main stone enhance its brightness and make it seem larger. For an even more dramatic effect, you could choose a double halo setting. If paired with a slender band, this can turn a smaller diamond into a visually larger and more extravagant gem.

Ensure that the main diamond remains the center of attention.

Many ladies prefer a diamond that appears large. If your ring band is overly fancy or wide, it could detract attention from the diamond, making it seem smaller. If you want to highlight your 0.4 carat round diamond ring, it's better to choose a simple band that doesn't overshadow it. However, if you find the overall design of the ring more enticing, a detailed band could be what you desire. Just keep in mind, this might diminish the diamond's sparkle.

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

Creating a one-of-a-kind item is a special journey that lets you shape a piece of jewelry that embodies your distinct style and personality. And the best part? It won't break the bank like buying from a physical store. With reputable online jewelers like Brilliant Earth, James Allen, and Blue Nile, you can tailor every element of your ring to your liking, 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.

Shop online with one of our respected partners to make your purchase. Each link will take you to the top deal for a diamond ring.

We have rated each company and every "Shop Now" link will take you to the best prices for high-value diamonds. In simple terms, it uses our specific settings on every website to find the best deals on what you're looking for. Enjoy a wide variety of choices, personalized rings, and excellent customer service.

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. 

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 round diamond ring worth?

A 0.4 carat round diamond ring is worth around $500.

How big is a 0.4 carat round diamond ring?

A 0.4 carat round diamond ring has a diameter of 4.8mm. This makes it look visibly smaller than a 0.9 carat round diamond ring, which has a diameter of 6.1mm. When compared to a 0.5 carat round diamond ring, however, the difference is barely noticeable, as the 0.5 carat diamond has a diameter of 5mm.

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

A 0.4 carat round diamond ring is quite delicate and petite on a hand. It has a width of 4.8mm, which means it takes up about 28.5% of the finger's width.

What is the price of a 0.4 carat round diamond ring?

The price of a 0.4 carat round diamond ring falls within the price range of $340-$1,220.

Is a 0.4 carat round diamond ring good enough?

Yes, a 0.4 carat round diamond ring can be considered good enough depending on personal preferences. While it may not have the same visual impact as larger diamonds, it can still be beautiful and elegant. The quality of the cut, clarity, and craftsmanship also play a significant role in determining the overall appeal of the ring.

Is a 0.4 carat round diamond ring big?

No, a 0.4 carat round 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. It may be more delicate and subtle in appearance. However, the size of the diamond ultimately depends on personal preference and style.

What does a 0.4 carat round diamond ring weigh?

A 0.4 carat round diamond ring weighs 0.08 grams.

Should I get a 0.4 carat round diamond ring?

A 0.4 carat round diamond ring is a popular choice for its affordability, simplicity, and versatility.

Is a 0.4 carat round diamond ring too big?

No, a 0.4 carat round diamond ring is not considered too big.

Is a 0.4 carat round diamond ring small?

A 0.4 carat round diamond ring can be considered small. The size of the diamond will appear smaller compared to larger carat sizes. However, the overall appearance of the ring can be enhanced by choosing a setting that complements the diamond and makes it appear larger.
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