4c's of diamonds


The 4C's of Diamonds: The Ultimate Guide to Cut, Color, Clarity, and Carat

When it comes to buying a diamond, whether for an engagement ring or a piece of statement jewelry, the choices can be overwhelming. Engagement rings are a big investment – an expensive symbol of love and commitment. So if you’re looking to buy the perfect diamond for your loved one, this guide aims to demystify the key elements you need to know—popularly known as the 4C’s: Cut, Color, Clarity, and Carat. Mastering the basics of these four aspects can help you make an educated choice and find the perfect diamond for your needs. 

THE  NITTY-GRITTY: -All of the 4 C’s of Diamonds play a role in a diamond’s beauty Above all we suggest Cut quality as the most important.  Followed by color,  clarity and carat.    Cut determines the Life and sparkle of the diamond, the rest complement each other and give the overall effect.  To get a great value you need to play with the variables.  Starting off with I color and SI1 Clarity. Vendors such as James Allen and Blue Nile have great tools to filter out specific fields to pinpoint what we are looking for.   Options like this beautiful budget stone .92 J color SI1 or this dazzling VS1 I color 1.50 .  Allow me to guide you to a smooth, risk-free diamond purchase. 



Knowing the 4C’s of a diamond—Cut, Color, Clarity, and Carat—is essential for any buyer. These are the four key attributes that not only define the quality of a diamond but also heavily influence its price. In this guide, we’ll take a deep dive into each of these important variables, ensuring that you’re well-equipped to make a meaningful purchase.

The Brilliance of Cut 

What is Diamond Cut?

Contrary to common belief, the cut of a diamond doesn’t refer to its shape but how well the diamond’s facets interact with light. An excellent cut brings out the brilliance of a diamond, making it a sparkling masterpiece.

Elements of a Great Cut

The main elements contributing to a diamond’s cut are brightness, fire, and scintillation. Brightness is the total reflection of white light, both internally and externally. Fire refers to the dispersion of that light into the colors of the spectrum. Scintillation is the amount of sparkle a diamond produces, along with the pattern of light and dark areas.

Why Cut Matters

An ideal cut optimizes light reflection and maximizes brilliance, significantly impacting the diamond’s beauty and, consequently, its price.  Click on the links to see two different diamond samples, one with a poor cut, the other with an Ideal cut.  You will see the drastic look of the diamonds and the price difference of 1,000!

The Diamond cut is the quality that breathes life into the stone. The allure and beauty come from the diamond’s fire, sparkle, and brilliance. The cut is the most important factor when it comes to determining the overall quality and beauty of a diamond. A well-cut diamond catches light at many angles, making it sparkle and appear larger than life! A poorly cut stone will be duller in appearance and won’t reflect as much light compared to a better-cut stone. When looking at diamonds, look for one with an attractive form that has been expertly crafted with precision. The better the cut, the more valuable it will be, as it will have been crafted according to exacting standards set forth by industry experts such as GIA (Gemological Institute of America). By far the most important C in the 4 C’s of Diamonds.  A well-Cut Diamond not only helps the fire and brilliance of the diamond but also all other factors. A beautifully flashy diamond will appear larger, make inclusions(imperfections) hard to see, and also hide a lower color better.  A well-cut diamond will also make sure the dimensions are ideal in proportion.  This means a one-carat will look like a one-carat.  If the cut is poor, this can be because the shape is off, and bottom-heavy, causing the diamond to appear smaller from the top view.  These are the major components that contribute to the Cut grade.  If you wish to view a perfect cut, CLICK HERE 

4C's of DiamondsThe 4C's of Diamonds

25% off your setting Plus 30%
Off Lab Diamonds

Lab Created Diamonds

Not all diamonds have a cut grade

Round diamonds are the only diamond shape that GIA awards a cut grade to. Making the 4C’s of Diamonds hard to grade for fancy cuts. Fancy shapes have a wide range of proportion combinations are possible. Sometimes the most ideal numbers don’t add up once you add up all the angles and attributes. Each stone is different. Here is a photo example of a Princess Cut and how a poor cut can affect the size of the diamond.  This was found in Blue Nile.   Both diamonds weigh 1.01 carats.  One diamond is too deep with a large table.  The other has perfect proportions.  Even though they weigh the same, its clear one looks larger than the other.  Beware of cheaper diamonds on discounts.  Often, its discounted for a reason. 


 To be precise, measurements on the left are 5.65 x 5.61 x 3.88 mm  vs the right 5.32 x 5.14 x 4.11 mm.

Huge Tip:

Round diamonds are the easiest to buy regarding CUT.  Gia offers a cut grade only for Round Diamonds.  All Other Shapes like Princess, Emerald Cushion don’t have an official cut grade.  You have to evaluate the stone by eye and various elements such as table and depth percentages.  If this is confusing, please contact me here so I can guide you.     

Signature Selection

Take the guesswork out and go to the Signature collection! In terms of value and quality between the top brands, this is the most quality and value you can get.  Their price points tend to be the best when compared across other brands. 


James Allen signature line is called Hearts And Arrows, Named for the starburst pattern of hearts and arrows that has become the hallmark of the most ideal cut round diamond, each True Hearts™ diamond has perfect internal symmetry and proportions, and the highest gem grading for cut and polish.

diamond cut hearts and arrows 4 C's of Diamonds

James Allen,and Blue Nile  have their signature line of cuts.  If you are buying a fancy shape such as Princess, Cushion, etc.  It’s not a bad idea to look.  Pricing is fair considering the quality.

Blue Nile has Their Astor Line.  They have brilliant Princess and Cushion cuts.  If you are shopping for those it’s worth taking a look here.


What is a Carat?

A carat is a unit of weight used for gemstones, equivalent to 0.2 grams. While many think that carat refers to size, it’s actually a measure of weight, although there is an indirect relationship between the two.

See these 4 different price jumps every 0.50 carat jump

.50ct     1.00ct     1.50ct     2.00ct

Pricing and Carat Weight

The price of a diamond doesn’t increase linearly with carat weight; it jumps exponentially. A 2-carat diamond will be significantly more expensive than a 1-carat diamond, even more than double, depending on the quality of the other three Cs. 1 carat equals 0.2 grams (the same weight as about 5 paperclips). When buying diamonds by carat weight instead of size (measured in millimeters), remember that bigger isn’t always better since larger stones tend to cost significantly more than smaller ones even though they aren’t necessarily more beautiful!

Additionally, two diamonds with equal carat weights may differ greatly in terms of size depending on their shape—so make sure you understand both factors before making your final purchase decision! Customers usually default to this because size is easily visible to the human eye.  While color and clarity are hard to see. It’s the obvious aspect that adds expense as there really isn’t a way around it.  Size cost money. A 0.95 carat vs a 1-carat diamond has a large price jump. Each fraction can make a large difference in cost.  4 C's of Diamonds

Here is a 4 C’s of Diamonds buying tip:

What I love about different-styled engagement rings is you can dress it up and give it a larger appearance.  If you have a certain budget, it may have more impact to buy a .80 with a beautiful halo diamond engagement ring than a one carat on a solitaire band.   The halo engagement ring will give the diamond a larger appearance.  This may not be important to some and your significant other may prefer a solitaire. But if she likes size and it’s an expectation, a halo engagement ring may be best. Also, some stones such as an Emerald have a larger appearance.  However, refer to my buying guide to see the disadvantages of Emeralds.  I hope my guide can help you improve that size by much more by showing you how to buy correctly and spread your budget.



A certain trick of the trade regarding 4 C’s of Diamonds depends on the diamond cut, a 1-carat may be smaller than another one-carat.  What do I mean? Let me explain.  If a diamond is bottom-heavy- too deep in shape.  The top of the stone will shrink in millimeters. The same goes for a diamond that is shallow and as a result appears wider.  This is why cut grade is important even when evaluating carat size.

4 C's of Diamonds

Diamond Carat size

Notice the L/W/D  ratio circled. The top Princess measures 5.63-5.62mm versus the inferior cut stone below measuring 5.23-5.14mm.  Both Weigh about the same.


Diamonds come in many different colors from colorless all the way through various shades of yellow, brown, pink and blue. Colorless diamonds are considered more valuable because they are rarer; however, colored diamonds can also be quite stunning and provide their unique charm and beauty when set into jewelry pieces or displayed alone on a chain or bracelet. When selecting a diamond based on its diamond color grade, make sure you consider both the color range and tone so you can find something that appeals to your personal style preferences while still being within your budget!

The more closely a diamond approaches colorless, the less color, the more they are valued.  As a tip found in my diamond color guide,  you will see the sweet spot for value is in between H-J color.  In terms of hierarchy in the 4 C’s of Diamonds, I consider it 3rd in importance. See below for a sample chart.

Diamond Color Chart

Especially relevant,  a Diamond color under M is not recommended.    In the illustration below you will see samples of color. HOWEVER, when the diamond is facing up that color is harder to see.  Consequently, this is why I love that H-J color.  Again see my Color guide for tips best colors depending on what diamond shape you are buying.   See this example of a J Color Diamond mounted below.  Learn how Diamond Florescence can improve your J color diamond.

DO YOU SEE A LOT OF COLOR? 4 C's of Diamonds

Below is a color chart showing color illustrations.

4 C's of Diamonds

Most noteworthy, remember Color starts from the tip of the stone towards the face.  Different shapes can affect the diamond color.  A round diamond hides color very well. In contrast, when buying a Pear shape or Emerald, you must choose a higher color. See the images below for an example. For recommendations per shape regarding color, visit my Color page for deeper info.

4 C's of Diamonds


Clarity refers to how clear a diamond is; meaning how free it is from blemishes or other imperfections such as cloudy patches or black spots known as “inclusions”.  Clarity can affect how well your diamond reflects light which makes them appear brighter than they actually are—so keep this in mind when making your selection! The higher clarity grades usually cost more but may not always be worth the extra money if they don’t add much to the overall appearance of your piece due to their size or location within the stone itself!

In terms of hierarchy in the 4 C’s of Diamonds, I consider it last.  High clarity isn’t needed and  You won’t be able to see a difference between VS1 or higher. Only get higher quality if there is a good deal.  Each diamond is unique. A diamond has a fingerprint unique only to itself. Hence, Clarity refers to their birthmarks/flaws. Either internal (inclusions) or external (blemishes).  The grade refers to the absence or presence of inclusion(flaw). In conclusion, Flawless is so rare some jewelers have never encountered one.  So don’t think you need a flawless stone.  Find a deeper discussion on clarity Here.  As stated I find SI1 to be the sweet spot for value and quality.  It’s possible to find an SI2 diamond that’s eye clean with great attributes. Those are stones worth evaluating and rarely an I1 can be found that’s a great stone. 

Below are descriptions of each clarity grade:

    • Flawless (FL) – No inclusions and blemishes are visible to a skilled grader using 10× magnification.
    • Internally Flawless (IF) – No inclusions and only blemishes are visible to a skilled grader using 10× magnification.
    • Very, Very Slightly Included (VVS1 and VVS2) – Inclusions are difficult for a skilled grader to see under 10× magnification.
    • Very Slightly Included (VS1 and VS2) – Inclusions are minor and range from difficult to somewhat easy for a skilled grader to see under 10x magnification.
    • Slightly Included (SI1 and SI2) – Inclusions are noticeable to a skilled grader under 10x magnification.
  • Included (I1, I2, and I3) – Inclusions are obvious under 10× magnification and may affect transparency and brilliance.

Diamond Clarity

Here is a Diamond Clarity Scale illustrating the different grades. Save Money Buying Your Engagement Ring buy staying in the SI1 range.  SI2 can work as long as the diamond is eye clean.


Below is an example of what the size of inclusion can look like and what grade it can be given. Furthermore, know that location of the inclusion doesn’t matter, rather its size.

 4 C's of diamonds| Save Money Buying Your Engagement Ring by Learning. 

Sample 1 has 4 examples of grading done. The pink marks illustrate imperfections. Sample 2 has more flaws but the same grade. How can that be?  Let me explain.  The biggest flaw found on a diamond is usually what gives its clarity grade.  I find this important to bring up because as you start shopping you will notice stones that have more inclusions than others but have the same grade.  Some Inclusions have different sizes, color and shapes. Some are clear and some are black, some twirl and engulf the stone like clouds.  If you are buying and want to have value SI1 is the way to go.  Almost always have a beautiful look that’s eye clean.  VS1 is great and as you can see here you won’t see the difference unless you are trained to view it under a loupe.


As you can see some Inclusions(diamond flaws) are white and are deeper or off-centered causing them to not be as noticeable.  Further proving the point that not all SI1 Diamond grades are the same.  This is again why I only recommend vendors such as James Allen, Blue Nile that have proven track records of thousands of happy clients and real images and video of their diamonds in regular lighting magnified so you can judge and evaluate more accurately.

4 C's of Diamonds

click on the image above to visit James Allen and learn more.

Save Money Buying Your Engagement Ring by choosing an SI1 Clarity.

MOST IMPORTANTLY- Save Money Buying Your Engagement Ring  and use trusted vendors that use GIA grading reports or AGS Diamond Certificates to grade the 4 C’s of Diamonds.  Do not buy a diamond unless GIA or AGS certified.

4 Cs of DiamondsSave Money Buying Your Engagement Ring

Miami corporate video production produced by Buzz Media Agency

 The 4Cs of diamond are important to understand when looking for the perfect engagement ring. After all, an engagement ring is a symbol of love and commitment that will last a lifetime – so getting it right has never been more important! Knowing the 4Cs is essential in getting the best value for money and finding a beautiful sparkler that your partner will love. So brush up on your 4Cs before you go shopping – you won’t regret it! 

In short, there are four primary factors used when assessing a diamond’s quality—cut, color, clarity & carat weight—and understanding these components can help you select exactly what you’re looking for while staying within budget! By taking into account all four Cs before investing in a special piece of jewelry featuring beautiful diamonds inside them then you’ll have peace of mind knowing that whatever item you buy is going to be exactly what you were hoping for! Whether it’s an engagement ring for someone special or just an everyday accessory for yourself – learning about these four aspects helps ensure that your investment is well worth it every time! Thanks for reading our guide on understanding the 4C’s of Diamonds – now get out there and find yourself some sparklers! Happy shopping!

Recommended Places To Buy

For me to recommend any business, they must meet certain criteria. They must prove valuable to my clients in regards to How to buy a diamond savings and selection | EXPECT 20%-40% LOWER PRICES THAN TRADITIONAL JEWELERS |, time doing business(legitimacy), reputation, and return policy.

James Allen Logo

James Allen  has the highest volume in diamond sales in the web and now have 500,000 diamonds in their inventory.  They have industry leading diamond viewing technology.  The ability to see your diamond more clearly than in a physical retail store is a massive plus for you. JA has incredible costumer service and have a massive Lab created diamond consisting of HPHT diamonds in their inventory.

They have free shipping domestic + international – free ring resizing –  no questions asked money back return 30 days  – provides insurance appraisals –  lifetime warranty


Blue nile logo

Blue Nile was the original online giant that opened in 1999! They have the industry-leading largest available exclusive online inventory.  They have incredible prices and their images are catching up to James Allen.

No questions asked money back 30 day guarantee – Free shipping – Free ring sizing – Provide insurance appraisals –  Lifetime warranty – 100% future credit towards upgrades


Feel free to reach out and send me a message. Do you want buying advice on How to buy a diamond or have you found a stone you wish for me to evaluate. Feel free to drop me a line and say hello. Advice is free.


Scroll to Top