The original Hatton Garden directory
List Your BusinessAdvertising Opportunities
HATTON GARDEN JEWELLERS
Directory
HATTON GARDEN JEWELLERS

The original Hatton Garden directory, est. 2003

Diamonds

Which of the 4 Cs of Diamond Matter the Most?

26 September 2023|By Hatton Garden Jewellers|16 min read
16 min read

For hundreds of years, the desirability of diamonds has captivated the hearts and minds of people worldwide to the point of being featured in internet games like Gems Bonanza Jewels game. They have been recognized as a symbol of status, love, and luxury fashion for centuries. Their rarity, beauty, and durability make them the single most precious stones on earth.

However, buying diamonds may not be as easy as you may perceive. Choosing the right diamond requires due diligence to know what you are buying. In that case, the best place to start is to understand the 4Cs of a diamond because they dictate its appearance and quality.

This write-up will go over the 4Cs of a diamond (cut, colour, clarity, and carat weight) to determine which of the four matters the most.

1.  Cut

A diamond cut is the most important property of a diamond. It refers to how well a diamond has been shaped from its natural state to bring out its brilliance and sparkle.

A diamond's cut is graded based on its polish, symmetry, proportion, and performance. A poorly cut diamond will have light leaking out from its pavilion facets because it reflects light downward, diminishing its shine. On the other hand, a well-cut diamond will draw light in and reflect it outwards to showcase its brilliance.

You may have a diamond with the most amazing colour and excellent clarity, but the sparkle is what will allow it to be seen. This is why cut is the most important property when valuing diamonds.

2.  Colour

Colour is the second most important property when it comes to valuing diamonds. The less colour a diamond has, the more rare and valuable it is. "Whiter" diamonds are considered more visually appealing because their brightness allows them to reflect light better than their counterparts.

The Gemological Institute of America (GIA) classifies the colour of a diamond based on a letter grading scale, ranging from D to Z. Less coloured diamonds occupy the D, E, or F spectrum and are considered exceptionally rare, making them more expensive than the rest. Most coloured diamonds occupy Z on the grading scale, with G, H, I, and J considered nearly colourless. Remember to always base off a diamond colour using your naked eyes. Nonetheless, it all boils down to personal preference.

3.  Clarity

Diamond clarity refers to the inclusions and blemishes within a diamond. It is rated based on the amount, location, relief, and type of inclusions.

A lot of people place so much emphasis on clarity when purchasing diamonds. They believe that inclusions affect diamonds' durability and appearance. Well, the fact is that rating should be the least of your worries when valuing a diamond because they can only be viewed under a 10x magnification, which is hard to detect with the naked eye.

Nonetheless, clarity is still an essential factor because it will determine how valuable your diamond is. In fact, most jewellers choose double pyramid or octahedral diamond crystals as their preferred rough source diamonds because they are internally pure when emerging from the ground. Besides, they are more difficult to source, which makes them more valuable.

4.  Carat Weight

One common misconception many people have is that the carat weight in a diamond is determined by its physical size. In diamonds, carat weight represents the diamond's weight and not the actual size.

Diamonds can have similar carat weights but differ in size depending on how they have been cut. The cut of a diamond determines how large it appears and the amount of sparkle it emits, making carat weight the least important of the 4Cs of a diamond. Therefore, when purchasing a diamond, ensure it's cut for beauty and consistency rather than size alone.

Final Thought

Although cut is the most essential quality in a diamond, many people still choose diamonds based on personal preferences, including size, colour, and other attributes. Others assume that clarity and colour are what dictates a diamond's brilliance and sparkling qualities, and as such, they end up paying more for what they could have paid less if they had the right information.

Nonetheless, your diamond will need regular cleaning and care to maintain its sparkles once you buy it!

Tags
gemological instituteprecious stonesblemishesgrading scaledurabilitySparkleinclusionsclaritydiamondsvaluationfashionluxurycolourbuying guidecarat weight4Csbeautyraritygemstonescut
Share𝕏inf

Continue Reading

View all articles β†’
Diamonds

Diamond Cut Grades Explained For Hatton Garden Buyers

21 April 2026Β·2 min read

Discover why diamond cut grades matter more than colour or clarity when buying in Hatton Garden. Expert insights on choosing the perfect stone.

Read Article β†’
Diamonds

How to properly care for diamonds: tips for preserving their shine

10 February 2026Β·3 min read
Read Article β†’
Diamonds

Black Diamonds and Coloured Stones

4 February 2026Β·3 min read
Read Article β†’

The Hatton Gazette

Delivered weekly to your inbox

Join 12,000+ Hatton insiders

Browse

Popular Categories in Hatton Garden Jewellers

Our Featured Partners

We use cookies and analytics to understand how the site is used and to keep the service free. Choose Accept All to allow this, or Essential Only to use just the cookies we need to keep the site working. You can change your choice any time in our Cookie Policy