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Diamond price: how to evaluate the value of a diamond in 2024?

UPDATED - January 5, 2024 | Reading time: 15 minutes

Inform yourself about diamond prices before buying to avoid overpaying

Are you considering buying a diamond? You probably have a fixed budget for the engagement ring. And your goal is to get the best, biggest, and brightest diamond with that budget. We will show you exactly how to do it.

If you want to get the best value for money, focus on certain aspects of the diamond and know which ones you should not prioritize in order to offer yourself a valuable engagement ring that you will like.

Basic rule: a 1 carat diamond could cost between 2,000 and 25,000 euros. This means mathematically that the price of a mid-range diamond should cost between 11,000 and 12,000 euros. This seems simple but not so obvious as one should not think in this way.
A good quality and good value 1 carat diamond should cost you between 4,500 and 7,000 euros. We explain below the price of the diamond and how you should choose it.

In summary: Save money on size and clarity. You just need a clean diamond (flaws are not visible). We recommend diamonds of H color and VS2 purity as median quality suitable for jewelry use.


To evaluate the price of a diamond, 4 essential elements must be taken into account: The shape of the diamond, the internal characteristics of the stone (The 4Cs), the type of diamond (white or colored) and the laboratory that certifies the stone.

To give you a first brief idea, please find the average diamond price updated in October 2022

  • The average price of a 0.5 carat diamond is 1,850 euros
  • A 1 carat diamond is worth between 5000 and 8000 euros
  • A 2 carat diamond is worth between 20000 and 28000 euros.

Of course, the real price range is much wider, but these price ranges indicate the threshold where you get the best balance between the price, quality and beauty of a diamond.

We will review all the factors that influence the price of diamonds. You will receive our expert advice on how to get the best value to avoid making a mistake.

Reading this guide only takes 15 minutes. At the end, you will be armed with the necessary knowledge to save up to 40% on your engagement ring or any other diamond jewelry.

In this guide, you will find:

- The price for a 1 carat diamond

- The price for a 2 carat diamond

- The price for a 3 carat diamond

- How are diamond prices calculated?

- How to calculate the price per carat?

- Impact of the 4Cs on diamond prices

  1. Carat : is it the most important?
  2. Cut : Why should it be the number 1 priority
  3. Color : Influence of color on price
  4. Clarity : to consider also but to choose with awareness

Shape : Value, cut and sparkle, Certification, Fluorescence.

In summary : We will give you our recommendations to get the best value for money and choose the ideal stone with full awareness.


In this article, we will discuss the industry secrets about the price of diamonds that traditional jewelry stores rarely explain, but before we get into the details, here are some things you absolutely need to know to get the best diamond for your budget.

Quality (4C): The carat weight, cut, color, and clarity of a diamond determine its value. The more perfect and colorless the stone, the higher the prices.

But here's a secret: save on color and clarity. These characteristics are usually not visible to the consumer with the naked eye. All you need is a diamond that looks clean and white.

We recommend H color and VS2 or SI1 clarity as the median diamond quality for perfect aesthetics.

Certification: It is extremely important that you only buy a diamond certified by a reputable laboratory from 0.50 Carat. It is thanks to this certification that you will know that you have paid for the advertised quality.

We recommend diamonds certified by GIA, HRD or IGI laboratories as these certifications have the highest grading standards.

NB: many customers choose so-called "effect" stones which have a price optimization compared to carat weight. For example, if you want to buy a 1.00 Carat diamond for less than 3000 Euros or a 2 carat diamond for less than 7000 euros, the diamond will certainly not come with a laboratory certificate as every expense counts to reach your price.

Where to buy: The jeweler's profit margin is the factor that most influences the price of diamonds. A stone of the same quality can be several times more expensive when it is presented in a small blue branded box.

To avoid paying high prices, we recommend you shop online at places like Online retailers can cost up to 50% less than large jewelry stores.

It is important to realize the seriousness of the diamond dealer as well as briefly assess their operating and advertising costs in order to understand the selling prices.

What price for a 1 Carat diamond?

the price of a one-carat diamond ranges from 2000 to 25000 euros depending on its shape:

  • 2,000 to 25,000 euros for a round diamond
  • 2,000 to 10,000 euros for a princess cut diamond
  • 1,700 to 17,000 euros for a cushion cut diamond

The average size of diamonds for engagement rings is about 1 carat. So, how much can you expect to pay for a 1 carat diamond? Here is the price chart: 

A good price for a 1 carat engagement ring is around 6,000 euros for a diamond of ideal size color H and clarity VS2. We will explain in this article what "size, color and clarity" means.

The table below shows the price ranges of diamonds for an ideal size 1 carat round stone. Depending on the color and clarity, you can easily see the big price difference.
































































The indications below highlight the best value for money. The H color and VS2 clarity will allow you to get a white-looking diamond that will appear clean to the eye. If you can find a diamond with TOP SI1 clarity, that's even better.

Price of diamonds in store versus their online price

One thing to note is that we use the prices of online jewelers. Celinni conducted an independent market study, which revealed that online jewelers offer prices 32 to 50% lower than those of major traditional jewelers.

Online jewelers are able to offer much lower prices due to their low overhead costs.

They are also able to offer a larger selection. 

If you see a cheap diamond in a traditional store or if there is a great diamond sale going on, make sure the diamonds are certified. 

In many cases, they are not, and that's why they are on cheap sale.

Make sure also that you are indeed buying a natural and unmodified diamond!

How much to pay for a 2 Carat diamond?

The price of a 2 carat diamond varies between 5000 and 80000 Euros depending on the internal elements that compose it. The median price for a good quality diamond is between 20000 and 25000 Euros.

Here is a price table based on an ideal size, a round 2 carat diamond depending on its color and purity:

The HTML code is already in English. The only French part is the currency symbol "€" which is used across many countries in Europe, not just France. The rest of the content (IF, VVS1, VVS2, VS1, VS2, SI1, SI2, D, E, F, G, H, I, J) are universal terms used in diamond grading and are the same in all languages.

The highlighted boxes are those where we recommend you to stay to get the best value - A diamond that appears white and clean to the eye. Also remember that for fancy shapes, you can also get an additional 10 to 30% of these prices.


What is the price of a 3 Carat diamond?

A 3 carat diamond can cost between 20,000 and 200,000 euros or more. To get the best value for money, we recommend a 3 carat diamond of H color and VS2 clarity, which will cost about 35,000 to 50,000 euros, depending on the shape.

How are diamond prices calculated?

There is no single diamond calculator. Many factors determine the final selling price of a diamond. We will come back to these factors later in this article.

The price of diamonds is calculated per carat. The price per carat increases exponentially as the carat weight increases. Indeed, it is rarer to find larger diamonds.

For example, a round diamond of 0.25 carat starts at about 300 € and a round diamond of 0.5 carat starts at about 650 €.

 But a round diamond of 1 carat reaches more than 2,000 € in the lowest range. For better value for money, we recommend staying just below half or full carat weight (for example, opt for 0.9 carat instead of 1 carat).

How to calculate the price of diamonds?

The price of diamonds is calculated per carat. A 0.5 carat diamond can cost 2,500 € per carat. The price of this diamond would be 1,250 € (2,500 € * 0.5).

The cost per carat increases depending on the weight and quality.

To determine the price of a diamond, you need to examine the 4Cs: Color, clarity, size and carat weight.The price of different shapes also varies. No real diamond is identical to another.

Did you know that:Like diamonds, there are no two snowflakes that look alike ?

How to calculate the price per Carat?

Using the price per carat, here is how to calculate the actual price of diamonds:

  • If a G SI1 stone of 0.91 carat is €5,500 per carat, the price of the diamond would be €5,005 (0.91 x €5,500)
  • If a 1.2 carat H VS2 stone is €7,200 per carat, the price of the diamond would be €8,640 (1.2 x €7,200)

Here's how you can use the price per carat to determine the best value.


Let's assume you are deciding between two diamonds of the same color, same clarity, and same size. Both are the same size.


  • A 0.88 carat diamond that costs €5,000. The price per carat is €5,682 (€5,000/0.88)
  • A 0.82 carat diamond that costs €4,800. The price per carat is €5,853 (€4,800/0.82)


Even if the second diamond costs less, it is actually more expensive per carat. In this case, one might therefore think that the first stone is the most advantageous.

Note that to compare the price per carat, you must compare apples with apples. This means that you must compare diamonds of the same size, color, clarity, fluorescence, and laboratory certificate. You should also examine the actual appearance.elle. This means that you need to determine if any defects, shades, or blurs are visible.

The price of diamonds is set per carat.

Here is what you get at lower carat weights.

How much does a 0.5 carat diamond cost ?

A good quality 0.5 carat diamond (H, VS2) costs about 3,000 euros per carat.

This means that the price of the diamond itself would be €1,500 (0.5 * €3,000).


How much is a quarter carat diamond worth ?

A diamond of 0.25 carat of similar quality is worth about 2,000 euros per carat. Therefore, the diamond itself would cost 500 € (2,000 € * 0.25).

What is the price grid for diamonds ?

TheRapaportOr Rapaport Diamond Report is a price chart that aims to be a reference base for the pricing of various bulk diamonds. It is published every Friday and is supposed to represent the current market value of diamonds.

Here is what a Rapaport looks like as an example (see above)

Note: This table is provided for indicative purposes only and does not reflect the actual prices of diamonds.

It is presented in the form of a grid comparing the color and clarity of different carat ranges. The figures are expressed in hundreds (43 = €4,300). The price indicated is per carat. You need to multiply your carat weight by the number indicated to get the final price of the desired diamond.


Limits of diamond price charts in the industry

If there is a complete chart on the price of diamonds, why not use it all the time ?

The Rapaport chart makes the price of diamonds appear very simple. However, it presents certain problems, including:

He does not take into account the quality of size:Rapaport prices are based solely on carat, color, and clarity. But the cut is a very important factor. Elle influences the brilliance of the diamond. And the price difference between the different cutting qualities can be huge.

Different diamonds of the same quality can have a very different appearance.. An SI2 diamond can be completely eye-clean while another has visible flaws. A D color diamond can be beautiful and clear, while another looks blurry due to strong fluorescence. Of course, the diamond that is the most beautiful will be sold at a higher price.

The price is high. Rapaport himself says that the listed price is the "high price". Retailers usually apply a discount. Some jewelers will show you Rapaport's prices and tell you that you are making a "good deal".good deal"because they sell cheaper. If you are not familiar with diamond prices, you risk making a mistake by believing this.

Use this article instead to learn how to get the largest diamond with the most sparkle for the best value. Discover the main factors that influence the price of diamonds. Then, you will learn how to buy diamonds online to save even more and optimize your purchase.

The 4Cs: Essential elements for diamond price evaluation

You've probably heard about the 4Cs of diamonds: carat, cut, color, and clarity. This is a good starting point to initiate your education on diamonds.

The 4Cs combine to determine the overall beauty and price of a diamond. But this does not mean that each C carries the same weight.

Don't waste your money. Some Cs are not as important as others, but they can skyrocket prices. If you don't understand the basics, you risk spending a lot on features that you can't even appreciate at first glance.


Did you know? Don't dwell too much on finding the perfect diamond. Most women don't care too much about that. 86% of women say that the most important thing is the overall design of the engagement ring for example.

You men, therefore, make more effort to find the style of engagement ring that she will like the most.


Among the most common mistakes are:

  • Buying a diamond of too high color and clarity thinking it will make the diamond more "brilliant".
  • Assuming that all diamonds are cut the same way and thus getting better color and clarity.
  • Placing too much importance on carat weight and then having to make sacrifices on other criteria to stay within budget, resulting in a dull and poor quality diamond.


Don't make these mistakes. This guide will help you know what to look for in a diamond, what to prioritize and what you can afford to "save".


Attention: Some retailers may try to overwhelm you with diamond price charts to show you how good a deal you are getting.

It is true that wholesalers and traders use Rapaport as part of industrial trade. At first glance, the reports make the price of diamonds seem like a simple black and white process.

However, this is not the case. Although it can serve as a good reference base, it lacks several important factors.

For example, it does not take into account the size of the diamonds, which you will soon discover that elle is the most important of the 4C according to our opinion.

Experience shows that the charts associated with the price of the diamond must be used with caution.


CARAT - What influence on the price of the stone?

Most people prioritize the carat. That's why it's first on this list. However, in our opinion, it's not necessarily the most important.

The carat is generally the most visible of the 4C. Most admirers say "what a big diamond!" instead of "what a colorless and flawless diamond!"

Unfortunately, this is probably the area where you have the least control. You probably already have a goal or a "requirement" and you can't deviate too much from it.

So, what exactly is a carat? The carat refers to the weight of the diamond. One carat is equal to about 0.2 grams, which is roughly the weight of a paperclip. The higher the carat weight, the larger the diamond.


Good to know: the word "carat" comes from the carob tree, a seed of the Mediterranean carob tree. These seeds have a very uniform weight. In ancient times, in Europe and the Middle East, they served as a weight reference for traders - especially when it comes to gemstones where slight differences in weight are important.


The price of a diamond increases exponentially as the carat increases. A 0.5 carat diamond is almost twice as expensive as a 0.4 carat diamond. It doubles again when you go up to 0.75, then to 1 carat. This is because it is increasingly rare to find raw materials good enough to make larger diamonds.


The biggest price increases are at the most demanded points: half-carat and a whole carat. To get better value, look for a diamond just a little below the whole number if your budget does not allow for the expected size.

For example, here are some comparisons of 0.9 carat stones and 1 carat stones:

You can see that a 0.92 carat diamond costs up to 1,000 euros less than a 1.0 carat diamond, simply because it is not a full 1 carat. But would anyone be able to tell the difference? It's very unlikely.


Here's the calculation: A 1 carat round diamond measures about 6.2 to 6.6 mm in diameter. But a 0.9 carat round diamond has a diameter of 6.0 to 6.3 mm. It's literally only a difference of 0.2 mm at most (which is equivalent to the thickness of a piece of paper). But you can save so much. Don't spend the money on something you can't even see. You would need a size difference of at least 20% to be able to distinguish it.



As the price of diamonds can make a considerable jump at a whole carat, diamond cutters are under a lot of pressure to cut stones that reach a nice whole carat weight. Unfortunately, this means that many diamonds are cut to reach this desirable round number instead of being cut for maximum brilliance.

That's why we recommend not getting too attached to a certain carat target and instead prioritizing the next "C".

Why should we pay attention to the Diamond Size?

(Cut in English)

We say it now and we probably repeat it often enough throughout this article. The size of diamonds is the most important factor, and you should NEVER skimp on this point.

In fact, put into the size all the money you can save on other areas.

It's the size that makes the diamond bright and sparkling. And elle can literally make the diamond so sparkling even if it hides inclusions and masks slight colors.

Size refers to proportion, symmetry and polishing, not shape. A rough diamond has no shine. A diamond only shines by the way it is cut and how light bounces off each angle and facet. A poorly cut diamond will lose its brightness and therefore appear dull.

A well-cut diamond will have ideal proportions and excellent symmetry and polishing. The proportions and facets are precisely cut to reflect as much light as possible. This means that the diamond will emit the most brilliance, fire and sparkle.

Let's examine the cut differences:

Here, you are looking at the images of 'Ideal scope of 3 randomly chosen diamonds that have (from left to right) a good cut, an excellent cut, and a super ideal cut. These images show the amount of light returned in red. You can see that the center of the first diamond has a lot of white, which indicates light leakage. The super ideal cut diamond, on the other hand, is all red, which means that all the light is reflected back to the viewer, making it super sparkling.

Aesthetically, the cut also has a huge impact on the beauty of the stone itself.

The images below show some examples of diamonds of different qualities, of cut (Good / Very Good / Ideal / Ideal Hearts and Arrow). You can easily see that the better the cut, the more beautiful the diamond is.

That's why it's so important to get the best possible size. Not only do you get a diamond that shines, but you can also afford to lower the other Cs a bit without having much negative impact on the diamond.


Price difference between natural diamonds and laboratory diamonds

First of all, it is important to emphasize that natural and synthetic diamonds have the same chemical and electrical properties.

The big difference lies in the age of the carbon.

Natural diamonds are found in the earth while man-made diamonds are created in ovens.

The price of the synthetic diamond is about 60% cheaper than the price of the natural diamond. Our partner Maison LAVERAN PARIS can guide you to buy a synthetic diamond at the best price.

Buying a diamond solitaire in Paris? Diamantaire Celinni is in Paris

We have a showroom in Paris, if you need information or want to buy a diamond solitaire, do not hesitate to contact our diamond dealers in Paris:

From Monday to Thursday: from 8:00 am to 6:00 pm

Friday: from 08:00 am to 5:00 pm

Sunday: from 9:00 am to 2:30 pm

Telephone hotline for making appointments 7/7 from 07:30 am to 9:00 pm at

We take care of your request and offer you a wide choice of diamond solitaires at the best price.

Buying a diamond solitaire in Nice? The Celinni is in Nice.

If you are near Nice like in Cannes, Monaco or Saint-Tropez for example, do not hesitate to contact our diamond dealers present in our Celinni showroom in Nice, open all year round, our diamond dealers will take care of your request:

- By email, at the following address: [email protected]

- By phone, at 04 93 73 17 45. You can call from Monday to Sunday, from 7:30 am to 9:00 pm.

Buying a diamond solitaire in Lausanne? The Celinni is in Lausanne, Switzerland.

If you are in Lausanne, Geneva in Switzerland or in France near the Swiss border for example. You can contact our new Celinni Lausanne Diamond Showroom. Open all year round, our diamond dealers will advise you on the purchase of a certified diamond:

- Phone: +41 21 601 37 11

- By email, at the following address: [email protected]

Buy a diamond solitaire in Casablanca?  Celinni House is in Casablanca, Morocco.


Are you in Morocco and want to buy a diamond solitaire at the best price? Do not hesitate to contact our showroom in Casablanca. A diamond dealer will offer you an appointment and will take care of offering you the diamond solitaire of your dreams at the best price.

Our jewelry store in Casablanca is located on Mutualité street next to the Iris Clinic.

Contact us to make an appointment:

Office Manager: Soraya FAIK

Please note: to meet a diamond dealer in Casablanca, you must absolutely make an appointment. You can do this by phone, at +212 5 22 94 97 59 or by email at [email protected]. Our teams will respond quickly to choose a date and plan your visit.


Check out our related articles: 

Celinni Diamond Dealer: Diamond ring

How to choose a 1 Carat Diamond Solitaire?

Diamond guide