Diamond Carat Weight Guide

Diamond Weight – Carat Explained

The Best Diamond Carat Weight Guide

The only diamond-carat weight guide you will ever need. Most people do not buy diamonds every day. To help you our Diamond Carat Weight we try to Explain it as simply as we can. Although diamond weight is an important thing to consider, so too is clarity, colour and cut when purchasing your chosen stone.

You will hear jewellers talk about the 4 “C’s” (Don’t get put off, it’s just like any profession they all have their own trade talk). The overall diamond carat weight is most likely to determine a diamond’s value. Fortunately, size is the easiest characteristic to measure. The term carat is a derivative of the word carob. Carob seeds are similar in weight to each other. Your diamond carat weight is divided into 100 points. So a half-carat equals 50 points and is expressed as 0.50ct. For example, a one-and-three-quarter would be 1.75cts.

Although it is true that the larger the stone, the higher the price. It is not true that a one-carat diamond is twice the price of a half-carat diamond. Larger diamonds are found less frequently in nature. A one-carat will actually cost much more than twice the price of a half-size stone of the same quality. Cut and mounting can also make a difference in the price. Remember that quality can be more important than size. A one-carat diamond with high colour and clarity values might be more beautiful. A two-carat diamond with lower clarity and colour values, despite a much higher cost. It is important to balance your priorities when shopping for a diamond.


There is no other gemstone quite like a diamond. It is a testament to endurance and strength, making it the ultimate symbol of love.

Diamond Carat Weight

Also remember, the smaller your finger, the larger the diamond will appear!

Every diamond is unique, yet all diamonds share certain features that allow us to objectively compare and evaluate them. These features are often called the 4C’s (cut, clarity, colour and carat weight).

A diamond’s beauty lies in its complex relationship with light. Its proportions affect how light behaves, which in turn determines its ‘brilliance’. At Rubie Rae Jewellery, we select the very best diamonds to fit within your budget and always ensure our diamonds are always the maximum size with the highest quality to maximise their sparkle!

Diamond Carat Weight

Why do diamonds cost vary so much

The value of diamonds per carat can vary greatly depending on the other specifications. A diamond carat weight has a large impact on a diamond’s value, along with cut, colour clarity and certification. This means that even two diamonds of the same carat weight will most likely differ in value. So it’s not all about the size, the diamond that stands out to you rather than what’s on paper is sometimes more important. After all, we are all individuals, just like diamonds.

Why is a Diamond measured in Carats?

The carat, the standard unit of weight for diamonds and other gemstones, it takes its name from the carob seed. Because these small seeds had a fairly uniform weight, early gem traders used them as counterweights in their balance scales. The modern metric carat, equal to 0.2 grams, was adopted by the United States in 1913 and other countries soon after.

Today, a carat weighs exactly the same in every corner of the world. Diamonds and other gemstones are weighed in metric carats: one carat is equal to 0.2 grams, about the same weight as a paperclip. (Don’t confuse carat with karat, as in “18K gold,” which refers to gold purity.)

Just as a pound is divided into 100 pence. A carat is divided into 100 points. For example, a 50-point diamond weighs 0.50 carats. But two diamonds of equal weight can have very different values depending on the other members of the Four C’s: clarity, colour and cut. The majority of diamonds used in fine jewellery weigh much less than one carat.

Diamond Carat Weight Guide

Things to consider

It is important to not get carried away and blow your budget when considering a diamond. When you look at the carat weight you also need to consider the cut when buying a diamond. A larger-carat diamond with a poor cut grade can appear smaller than a diamond of the same size with a higher cut grade.

Your Diamond Colour Guide

For further help speak to one of the team call 01423 589181 or if you prefer you can email: enquiries@rubierae.co.uk