The 5C’s of Diamonds

Only 2% of Diamonds make the Baker Brothers Grade


Diamonds by their very nature occur in all sorts of varying shapes and sizes. All sorts of factors effect a diamonds beauty and value so when making that most important of purchases its essential to have a clear understanding of what makes up the price and quality of your diamond.

A diamonds value and properties are best explained by the International grading system known as the four Cs.

Cut is the only diamond characteristic directly influenced by man – the other three are dictated by nature.

Many think that cut refers to the shape of the diamond rather than the ability and talent of a diamond cutter to create a diamond with the best proportions, symmetry and polish.

Cut is the most important aspect of a Diamonds sparkle – it is 80% of a diamonds performance.

It is the cut that causes the light to be dispersed and to reflect from each of the facets, which produces the sparkle.

The beauty of the diamond depends on the way it refract light, and the cutter must shape/cut the facets in such a way as to admit and reflect the maximum amount of light, so that the diamond sparkles with fire, brilliance and scintillation.

Baker Brothers will only select diamonds with a perfect cut – Anything less is rejected. Poorly cut diamonds will not make the grade at Baker Brothers.

Baker Brothers even look to see if there has been any extra facet cuts added to hide an imperfection, or if the girdle is irregular and disproportionate.


Shape is a matter of personal taste, with the most popular being the round brilliant. Often called fancy cuts, other shapes include the emerald, pear, marquise, princess, oval and heart.

However, it is astounding the variations of proportions of the fancy cut diamonds. The proportions are so important in these shapes as the sparkle will not emanate.

Baker Brothers see some appalling cuts of the fancy shapes, but once again will only buy those with exceptional cuts.

Princess Cut: Some diamonds are far from being square, as they should be.

Ovals & Pear Cut: These cuts with their pointy ends can cause problems in settings if they are not cut and proportioned well.

Why not view Hearts on Fire Diamonds – The World’s Most Perfectly Cut Diamond.

3 cut

While many people might say that diamonds appear colourless or clear, many contain subtle tones of yellow and brown. Therefore the degree of colourlessness has an influence on its beauty and thus price. For example the completely colourless, icy white diamonds are extremely rare and are priced accordingly.

Diamond colours are graded according to letters of the alphabet, starting at D the exceptionally white and exceptionally rare, right the way through to the letter Z, the tinted yellowy/brown colour.

Baker Brothers will only showcase diamonds of H colour or above, once you buy a diamond below a H, the colour will be tinted and not white the way a diamond should be.

4 colour


Diamonds that are said to be fluorescent contain particles that emit a visible (usually blue) glow when exposed to UV lighting. In some stronger cases this can make a stone appear milky or hazy. The degree of fluorescence can vary from slight to strong and as such the medium to strong fluorescent diamonds are less desirable.

All Baker Brothers diamonds are scrutinised for the existence of fluorescence and rejected if there is fluorescent present.

A diamond’s clarity is determined by the degree to which it is free from naturally occurring inclusions, often called ‘nature’s fingerprints’ or the ‘diamonds birthmarks’.

These inclusions were formed billions of years ago under the intense heat and pressure, from minerals or gasses, or other gemstones that may have been trapped inside the diamond as it cooled.

These inclusions are usually invisible to the naked eye, but their size, location and number can dramatically affect the stream of light through a diamond, causing the fire and sparkle to be lost.

These inclusions show as tiny specks or crystals that may look like feathers or clouds inside each diamond. The fewer inclusions, the greater the clarity, the rarer the stone and the more valuable the diamond.

The type, size and more importantly the location of an inclusion can cause problems in a setting and affect the performance of a diamond.

Diamonds are graded by an International recognised Scale, shown below, but what this does not allow for is the vast variations in each category.


Baker Brothers diamonds will have a clarity of Internally flawless to a Si1 of our criteria, as most Si clarity diamonds are not acceptable, which is why we select the very best to ensure that they are exceptional with a discreet inclusion which we can cover with a setting.

Baker Brothers reject any diamonds with chips, fluorescence, black marks, milky hues or inclusions that reach the surface, all of which can cause future disappointments.

2 carat

The carat of a diamond is the weight of a diamond not the size, as many think.

As with all precious stones, the weight of the diamond is expressed in carats (originating from a naturally occurring unit of weight: the seed of the carob tree).

One carat is divided into 100 points.

100 points = 1 Carat

50 points = Half a Carat

25 points = Quarter of a Carat

The larger diamonds are much rarer than their smaller counterparts. Indeed hundreds of tons of soil, rock and ore must be excavated in order to uncover a single one carat gem quality diamond, and less than 1% of all women will ever own a one carat or larger diamond.

Size is the most obvious factor in determining the value of a diamond. But remember two diamonds of the same carat weight can have very different values, depending on the cut, colour and clarity so it is important that all four characteristics are taken into account.

Unlike other Jewellers, Baker Brothers will not but a diamond just to satisfy a carat weight, if the other factors of cut, colour and clarity are inferior.

Why can I buy with confidence when I buy with Baker Brothers?

You’re looking to buy a diamond and you’ve read all about what you think you need to know. You’ve scoured the internet and patrolled shopping centres across the county in order to find ‘the one’. From our buying guides, you’ve probably sussed that no two diamonds are the same and should be an expert on the 4C’s. However, one question remains to be answered…

Is there a 5th C? And if so, what is it?

You can take it from the experts at Baker Brothers, if there is a 5th C – it is confidence.

At Baker Brothers we have ultimate confidence in our diamonds. Due to the way in which we individually source and handpick each and every one of them, our diamond experts know them inside and out. We know that each one has a fantastic cut that can actually make them look up to 20% larger than what they are. We also have the confidence that our diamond prices won’t be beaten. Through regular research, we can guarantee Supersized sparkle with a Supersized saving on the price ticket. Our job is to help you make the best decision about how to buy your diamond which is evident from our excellent reputation.

Trust and confidence in Baker Brothers in all we showcase


Conflict Free

Baker Brothers has a zero tolerance policy toward conflict diamonds. Baker Brothers can ensure that all our diamonds are from areas that are free from conflict – because we only source our diamonds from suppliers that are in compliance with the Kimberley Process and we participate in the system of warranties.

While there may be people who are engaged in illegal diamond trading, it is important to deal with a jeweller you know and trust. We have been in business for many years and we require official statements of assurance from every single one of our designers and manufacturers .We have written assurances from every one that our diamonds are legally and legitimately sourced.