How to Choose the Best Diamond for You (A Jeweller's Guide)

You’ve asked your partner's family and friends, scrolled through their Pinterest boards and even risked a few sneaky questions, but it was all worthwhile because you’ve now found the perfect diamond engagement ring or bridal set for your partner!

Ok, so you’ve got the design sorted, what’s next? "How do I pick the right diamond?" You can’t have the perfect engagement ring without an amazing diamond, and the best way to select your diamond is through understanding the different types of diamond quality through the 4Cs.

4Cs of diamond quality

The 4Cs stand for:

  • Carat Weight
  • Colour
  • Clarity
  • Cut

These quality factors make up a grading system that determines the quality and price of your diamond.

Now it’s important to remember that the 4Cs is a guideline for you to select your diamond -- it shouldn’t eclipse your personal tastes and that of your partner. The most important factor is that YOU like the appearance of YOUR diamond.

You may view a diamond that achieves the highest grades across the 4Cs which will come with an eye watering price tag and not have that personal connection to it or find it beautiful. Selecting your diamond is a personal choice; sometimes the most affordable options speak the most to you!

With that said, let’s take a look at each individual element of the 4Cs. We’ve made it easy for you by breaking down the specifics and providing some helpful hints along the way so don’t worry it’s going to be fun.

Diamond Carat Weight

Ah carat weight, now this one can be a little tricky because carat weight doesn’t specifically refer to the “size” of a diamond but rather the “weight” of a diamond.

Is higher carat diamond better?

It’s a common misconception that all 1 carat diamonds are exactly the same size however this isn’t true! If you compared three diamonds all with a 1 carat weight, you would find that each one has slightly different dimensions!

Jeweller's Tip:

If you select a diamond with slightly bigger size dimensions that also falls into your chosen carat range, it will provide you with a diamond that appears bigger than it actually is. This is a great tip when trying to shop to get the best bang for your buck.


If you view the three diamond options above you will see that one of them (option 3) has larger dimensions than the other three however still weighs 1ct. This is what you’re looking for if you’d like to take advantage of the above tip.

The interactive tool below is an excellent way to compare diamond size options. Have some fun playing with the sizes and remember you can always fudge it a little bit as you’ve already seen.




Diamond Colour

Choosing the perfect colour for diamonds is a very personal choice -- diamonds are available in almost any colour your heart desires. Some of the most famous coloured diamond engagement rings feature stunning pink diamonds which previously were only available in a natural option; however, we are now able to offer incredible ethical lab-created pink diamonds.

When it comes to non-fancy coloured diamonds, the grading system uses the absence of colour as its key indicator. This may seem like a paradox at first, however as you will see in the interactive tool below, the further down the alphabet you go, the more visible the diamond's yellow colour becomes. The further up the alphabet, the greater the absence of colour.

Jeweller's Tip:

When it comes to diamond colour, we recommend staying within F-H range as this will provide you with incredible results for your diamond engagement ring. As you can see in the diamond colour scale tool below, you won’t notice a lot of difference when comparing D-H colours, and you’ll pay a higher premium for D-E -- that is why we recommend F-H. When you start comparing diamonds beyond the H colour diamond, you’ll start to notice a defined yellow tint entering the diamonds.




Diamond Clarity

The Clarity of a diamond involves understanding the internal (inclusions) and external (blemishes) characteristics that occur in diamonds. The greater the clarity grading of your diamond, the less likely these characteristics will be visible to your eye.

The highest clarity grade of diamond is flawless clarity (FL). This is a diamond with absolutely no inclusions and blemishes visible even to a skilled grader using 10x magnification. This the most expensive diamond clarity and is the type of diamond you would encounter at a museum, not generally in an engagement ring!

Jeweller's Tip:

Clarity numbers for diamonds: You won’t notice a lot of difference between VVS1 and VS2, so we recommend staying in-between VS1 and VS2 diamond clarity. This will provide you with an exceptional diamond no matter which diamond cut you select.

In the diamond clarity grading scale interactive tool below, you will see a lot of information about the types of clarity in diamonds, but the key points are the grading letters/numbers and the general description below. If you click on the plus symbol next to the diamond image, it will provide you with an example of the types of inclusions that are allowed when achieving the particular grade.




Diamond Cut

Now it might be easy to think that the types of diamond cuts describes the shape of your diamond; however it is actually describing how well your diamond has been faceted, proportioned and polished.

What is diamond cut grade? 

Your diamond's cut grade determines how well it interacts with light to produce its three most desirable visual effects: brightness, fire, and scintillation. The higher the diamond cut quality, the more strongly your diamond will display its brilliance, light, and sparkle.

The dimensions and proportions of a diamond can significantly influence the look, especially in elongated shapes such as Marquise, Oval, and Emerald and Pear cut diamonds. It’s always important to look for a well-balanced diamond -- pay particular attention to how long or wide it looks. The human eye will be drawn to items that don’t look symmetrical, so you don’t need any special skills here.

Jeweller's Tip: What is a good cut for a diamond? Don’t settle for anything less than excellent cut or very good cut for your diamond -- this will ensure you receive a diamond that has the brilliance, light and sparkle that will dazzle you from the moment you receive it.

In the interactive tool below you’ll be able to see the differences between the cut grades (for example, excellent vs very good cut) and how important it is. As you move down the cut grade, the diamonds become lifeless and lose those amazing properties.








You’re now ready to tackle your diamond purchase! Or, of course you could select from our incredible range of diamond engagement rings and we’ll do all the hard work for you. We search our world-wide diamond network for the best quality lab created diamonds to match your diamond engagement ring, and then present you with the three best quality diamond based on your design and budget. You can learn more about how we create your perfect engagement ring here .

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