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0.4 carat diamond ring Buying Guide

Our guide can assist you in saving up to $1,064.
Our guide is here to make sure you get the best deal when purchasing a 0.4 carat diamond ring. We will explain which aspects are worth investing in and where you can save money. Additionally, we will guide you on how to acquire the ring you've always desired, or maybe even a superior one.
Want to go straight to shopping?
We've put in the effort and found the greatest offers on diamond rings weighing 0.4 carats from top online stores. You can browse through our carefully selected collection by following the links 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 diamond ring.

The upcoming lessons will teach you how to save a ton of money while still getting a stunning 0.4 carat diamond ring. We'll show you how to maximize your savings and steer clear of deceptive tactics used by diamond companies.
Average Price
$740.93
Price Range
$290-$1,620
Our Max Savings
$1,064
Lessons 1-4  ∴  Save Money 
Lessons 4 & 5  ∶  Spend Money 
Lessons 6-8  ∴  Personalize & Decide 
⤫ 40% Cash Savings

Lesson 1

Buying Online

You can find better deals on diamond rings online. Retail stores can be up to 40% more expensive and have a much smaller variety to choose from.
$850 Cash Savings

Lesson 2

Clarity

Learn how to cut diamond ring prices in half with our clarity tips. Get ready to discover how to save a significant amount of money.
$160 Cash Savings

Lesson 3

Color

Color is another major factor that affects diamond prices. We will help you understand when you can save money by considering the diamond's color.
⤫ 85% Cash Savings

Lesson 8

Lab Grown

Lab-grown diamonds can save you more than 85% on a 0.4 carat diamond ring, but it's unlikely that you'll be able to sell it later.
☺ Spend Money

Lesson 4

Carat Weight / Size

Because women often find larger diamonds more attractive, it is advisable to allocate more of your budget towards this aspect. We can help you optimize the diamond's size while also finding ways to save money in other aspects.
☺ Spend Money

Lesson 5

Cut, Sparkle & Brilliance

The cut is the most crucial aspect of a diamond's overall appearance. It's not worth cutting corners in this area, as it is responsible for the diamond's brilliance and captivating appearance.
≔ Personalize

Lesson 6

Shapes

The shape of a diamond ring affects its overall look and shine. We will demonstrate the distinct appearance and how light reflects off each shape.
≔ Personalize

Lesson 7

Setting / Band

Choosing a solitaire ring can help you save money and create the illusion of a larger diamond. However, it ultimately depends on your personal preference.

Lesson 1 - Buy Online
Up to 40% savings here

When you choose to purchase a 0.4 carat diamond ring online, you can save up to 40% on your bill.

Deciding to buy your jewelry online has many advantages compared to shopping at physical stores, especially when it comes to cost, variety, and personalization. Websites like Blue Nile and James Allen can offer diamonds at significantly lower prices than traditional retailers, often up to 40% less, because they don't have the same expenses for maintaining physical stores. Online stores provide a larger selection of options, giving you the chance to find the perfect diamond from a wide range of choices. They also offer more opportunities for customization, allowing you to design your own ring that perfectly matches your vision. This adds extra value and personal touch to your purchase.

Click on the 'shop now' links below to begin creating your own affordable, high-quality 0.4 carat 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 cost of a 0.4 carat diamond ring is greatly impacted by the clarity of the diamond.

⊗ Up to $1,173 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 the presence of noticeable flaws. It's worth mentioning that these flaws are usually only visible when you look at the diamond through a 10x magnifying glass. Diamond clarity is categorized from "flawless" to "included". In the middle, you'll come across classifications like VS1, VS2, and SI1. These diamonds may have imperfections that can only be seen with 10x magnification. To the naked eye, they look absolutely flawless, so nobody will be able to notice any imperfections when they admire your ring!

Optimal Clarity Range for a 0.4 carat diamond ring

Choosing a diamond in the VS2-SI1 clarity range for your 0.4 carat diamond ring can result in significant savings, possibly reducing the total price by as much as $1,173. When it comes to the balance between price and clarity, we highly recommend considering diamonds with a VS2 clarity grade. However, it is important not to disregard SI1 diamonds. By spending a few minutes browsing through the available diamonds, you may come across SI1 diamonds that have an appearance that is nearly 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 - $1,782 This diamond is flawless, but it feels like it's too much considering the price. Savings - You could save $1,015 - $1,263 with a VS2, SI1, or SI2 diamond
‹ drag left or right ›

IF - Internally Flawless

Cost - $1,620 This diamond is internally perfect, which means there are no flaws inside it, although there might be some on the surface. It's quite extravagant. Savings - You could save $853 - $1,101 with a VS2, SI1, or SI2 diamond
‹ drag left or right ›

VVS1

Cost - $1,620 The diamond is almost perfect, but considering its cost, it's still excessive. Savings - You could save $853 - $1,101 with a VS2, SI1, or SI2 diamond
‹ drag left or right ›

VVS2

Cost - $1,520 These diamonds are really good, but we recommend choosing ones with slightly lower clarity since our eyes can't really tell the difference. Savings - You could save $753 - $1,001 with a VS2, SI1, or SI2 diamond
‹ drag left or right ›

VS1 - Very Slightly Included

Cost - $813 If you come across an amazing deal on a VS1 diamond, that's really great. However, the upcoming clarity grades are known to offer the best combination of affordability and value. Savings - You could save $46 - $294 with a VS2, SI1, or SI2 diamond

‹ drag left or right ›

VS2 - Very Slightly Included

Cost: $767 Total Savings: $46 - $853 If you want to make the most of your money, this diamond clarity is unbeatable. These diamonds appear flawless to the naked eye as any imperfections are completely invisible.
‹ drag left or right ›

SI1 - Slightly Included

Cost: $609 Total Savings: $204 - $1,011 You won't find a better deal on diamond clarity than this one. Just remember, not all SI1 diamonds are the same. While some may not impress you, many are truly outstanding and could easily be mistaken for a VS2.

Lesson 3 - Color

Diamond color is another significant factor in determining the price of a 0.4 carat diamond ring when shopping.

⊗ Up to $227 savings with these tips
Watch us save thousands by purchasing diamonds in the right range

What is Color?

Diamonds can have a slight yellow tint or no color at all. The Gemological Institute of America (GIA) ranks diamonds on a scale from D (colorless) to Z (yellow or brown). The majority of diamonds used in jewelry fall within the G-H range, which means they have a subtle color. This color is only noticeable when compared to higher-grade diamonds like D, E, or F. Larger diamonds tend to show color more prominently, but a diamond in the G-H range will still appear nearly colorless and be less expensive than a D-grade diamond, which is completely colorless.

Optimal Color Range For A 0.4 Carat Diamond Ring

Choosing the appropriate color grade for a 0.4 carat diamond ring can lead to significant cost savings. Instead of investing in pricier D-F graded diamonds, opt for one within the G-J range. This decision can still result in a breathtaking piece while potentially reducing expenses by up to $227, in addition to any savings achieved through smart choices concerning clarity. When it comes to more intricate designs like a halo diamond ring, featuring numerous smaller diamonds surrounding the central stone, it is advisable to select a central diamond falling within the G-H color range. By doing so, you can prevent any noticeable color contrast that may arise when comparing I-J graded diamonds with the smaller, predominantly colorless or near-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 - $731 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 $124 - $160 with a G or H colored diamond
‹ drag left or right ›

E color

Cost - $687 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 $80 - $116 with a G or H colored diamond
‹ drag left or right ›

F color

Cost - $646 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 $39 - $75 with a G or H colored diamond
‹ drag left or right ›

G color

Cost - $607 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 $36 with an H colored diamond
‹ drag left or right ›

H color

Cost - $571 Total Savings: $36 - $160 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 - $536 Total Savings: $71 - $194 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 - $504 Total Savings: $103 - $227 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 $500 on your 0.4 carat diamond ring with the choice of a lab grown diamond.

Lab-grown diamonds, also referred to as man-made diamonds, offer the benefit of having the same appearance as natural diamonds, but they are produced in a way that is more environmentally friendly and morally conscious. Moreover, lab-grown diamonds are more easily accessible compared to natural diamonds, resulting in much more affordable prices. In fact, a lab-grown diamond can be as much as 85% less expensive than a similar natural diamond.

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

Choosing the appropriate color grade for a 0.4 carat diamond ring can lead to significant cost savings. Instead of investing in pricier D-F graded diamonds, opt for one within the G-J range. This decision can still result in a breathtaking piece while potentially reducing expenses by up to $227, in addition to any savings achieved through smart choices concerning clarity. When it comes to more intricate designs like a halo diamond ring, featuring numerous smaller diamonds surrounding the central stone, it is advisable to select a central diamond falling within the G-H color range. By doing so, you can prevent any noticeable color contrast that may arise when comparing I-J graded diamonds with the smaller, predominantly colorless or near-colorless diamonds in 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?

Let's discuss diamond rings. What's the first thing that pops into your head? That's right, the size of the large sparkler in the center. When we asked women what was most important, they all agreed on one thing: size matters! The higher the carat weight, the larger the diamond, and that's where we recommend you spend a little extra!
Watch us compare sizes and help you visualize what you want. 

When you are shopping for a diamond ring that is 0.4 carats, consider selecting a ring from this carat range.

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 beautiful sparkle. For your 0.4 carat diamond ring, make sure to choose either an ideal or excellent cut.

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

What is Cut?

Looking for the most stunning 0.4 carat diamond ring? The diamond's cut plays a vital role in its sparkle and brilliance. It's all about how flawlessly and precisely each of its facets is crafted.

The diamond companies well-kept secret

You'd probably assume that a diamond with an 'Ideal' cut, famous for its flawless sparkle, is always the most expensive choice. However, the truth is that there are situations where a 'Fair' cut diamond, with the same carat, color, and clarity, can be pricier. It may sound strange, but diamonds that are poorly cut can appear larger while lacking the desired sparkle and brilliance. A diamond without any sparkle is akin to a smartphone without a battery.

Here's a crucial tip: always opt for GIA Certified Excellent Cut Diamonds (also known as "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 sparkliness of diamonds varies depending on their shape, and some shapes can add to the perceived value of a 0.4 carat diamond ring.

What is Diamond Shape?

The diamond's style is all about its shape, like being round, oval, or something else. Certain shapes can make the diamond appear bigger, while others add extra sparkle and timeless charm. To explore a range of 0.4 carat diamond rings with different shapes, be sure to use our shape tool in this section.

What shape to choose?

It's good to recognize that certain diamond shapes can make a stone appear bigger, and there are currently some trendy shapes available. However, the important thing is to concentrate on what personally speaks to you and brings you joy. If you need some direction, a brilliant cut diamond that includes Round, Marquise, Princess, Cushion, Oval, Pear, and Radiant shapes might be the perfect pick. Out of these choices, Round diamonds are the most popular, but Oval and Marquise shapes can give the diamond a bigger appearance with the same 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

With the right band, a 0.4 carat diamond ring can have a completely different appearance.

What is setting?

Often called the band, the setting is the metal part of the diamond ring. Typically made of gold, it comes in white, yellow, or rose gold colors. Another option is a platinum band. The setting plays a crucial role in how your 0.4 carat diamond ring looks. It's where you can express your personal style. Below, we've listed the top three settings. No matter which setting you choose, we recommend going for 14k gold. Keep reading to find out why.
The setting or band is really important for making your diamond look bigger and better. 

We suggest opting for a 14K gold band for your ring.

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 - A Great Band for a Flashier Diamond Presentation

According to survey results, a lot of women dream of owning a big diamond. If you want to make a 0.4 carat diamond ring look bigger, you should go for a simple Solitaire setting with a thin and elegant band. The combination of a smaller band and a larger diamond creates the illusion of a bigger stone. To enhance this effect, search for settings that have small diamonds along the band as decorative details. These additional diamonds will add a stylish touch without diverting attention from the main diamond.

Halo: Enhance Your Diamond's Size with Small Diamonds

The halo setting provides a different method to elevate the apparent size of your 0.4 carat diamond ring. By encompassing the main diamond with smaller ones, it produces a brilliant effect that gives the impression of a bigger diamond. For an even more striking illusion, you could choose a double halo setting. Combining this with a slim band can make a smaller diamond appear noticeably larger, creating the illusion of a more luxurious piece.

Ensure that the main diamond remains the center of attention.

A lot of ladies are attracted to a diamond that looks really sizable. If the band is overly decorated or wide, it could take the focus away from the diamond, making it seem smaller. If you want to showcase your 0.4 carat diamond ring, think about going for a simple band that won't steal the spotlight. On the other hand, if you're more inclined towards the overall design of the ring, a band with intricate details might be your style, but keep in mind that it could downplay the diamond's main role.

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

Creating a personalized piece of jewelry is an extraordinary journey, allowing you to design a unique item that truly reflects your individuality and taste, all while being more affordable compared to retail prices. With renowned companies like Brilliant Earth, James Allen, and Blue Nile, you have the chance to customize every detail of your ring, including the diamond's shape and the style of the band.
Start Building
Watch us take you through the entire building process on our favorite websites.

Buy with confidence online from one of our reliable partners. Each link ensures the best value for your diamond ring.

We have rated each company and designed the Shop Now links to direct you to the lowest priced and highest quality diamonds. Our filters are applied to each website to help you find the best deals on your desired item. Take advantage of a wide selection, customized rings, and excellent customer support.

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 diamond ring worth?

A 0.4 carat diamond ring is worth an average price of $700, with a price range between $290 and $1,620.

How big is a 0.4 carat diamond ring?

A 0.4 carat diamond ring has a diameter of 4.8mm. This size is slightly smaller than a 0.9 carat diamond ring, which has a diameter of 6.1mm. On the other hand, it is slightly larger than a 0.1 carat diamond ring, which has a diameter of 3.5mm.

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

A 0.4-carat diamond ring is relatively small and delicate on a hand. It has a round-cut shape with a width of approximately 4.8mm, occupying about 28.5% of the finger's width.

What is the price of a 0.4 carat diamond ring?

The price of a 0.4 carat diamond ring ranges from $290 to $1,620.

Is a 0.4 carat diamond ring good enough?

A 0.4 carat diamond ring can still be considered good enough, especially if it has a high-quality cut, good clarity, and is well-crafted into its setting. The size of the diamond may be smaller, but it can still be visually appealing and attractive.

Is a 0.4 carat diamond ring big?

No, a 0.4 carat 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 still be beautiful and elegant, but it will appear more delicate and understated on your finger.

What does a 0.4 carat diamond ring weigh?

A 0.4 carat diamond ring weighs 0.08 grams.

Should I get a 0.4 carat diamond ring?

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

Is a 0.4 carat diamond ring too big?

A 0.4 carat diamond ring is considered small in size.

Is a 0.4 carat diamond ring small?

A 0.4 carat diamond ring may be considered small in comparison to larger carat sizes. However, the perceived size of the diamond can also depend on factors such as the cut, shape, and setting of the ring. Additionally, personal preferences and individual finger sizes can also influence how small or large the diamond appears.
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