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Understand The Difference Between Term Carat vs. Karat

carat vs karat

Once a potential customer has begun the search for the perfect engagement ring, they will come across various new pieces of vocabulary that would specifically serve the purpose of describing different aspects of the material used in the making of jewellery items. Two such words would be the terms karat and carat, which most often lead to a lot of confusion amongst customers due to the similarities between how the words appear. 

Although they sound the same, there is a huge difference between carat and karat to the limit wherein the only major similarity between the words is their identical pronunciation. This difference is part of the vital knowledge that every jewellery customer must-have when shopping for precious stones and metals. 

carat vs karat

A carat, shortened into ‘ct’, can be defined as the physical weight of a diamond or a precious stone which is a globally recognized standard whereas karat is a mode of measurement designed to quantify the purity of gold found in an item of jewelry. A detailed explanation of both these definitions is given below. 


Often assumed to represent a precious stone’s size, carat weight is a technical measurement of a diamond’s actual weight and it is an acknowledged aspect of a gemstone’s identity wherein customers often rely on it while deciding the budget they seem would be appropriate to spend on the diamond or other gemstones. 

In terms of measurement, one carat can be equated to 200 milligrams or 0.2 grams. Digitally, 1 carat is expressed as 1.00 carat which helps in jewellers in allotting accurate and exact carat weight to the stones. If the other aspects of a diamond such as the cut, clarity, and colour are all made to be equal, then the price of the diamond would be directly proportional to its carat weight. 

The effect of carat weight on the other aspects of a diamond is quite significant and hence important to talk about.

Also Read: Diamond Carat: Understanding Sizing And Measurement Guide

Diamond Sizes 

Although a diamond’s size and carat weight are not synonymous as many people incorrectly presume, they still walk hand in hand and indirect proportionality. A 5.1 mm sized diamond will amount to 0.50 ct and 1.00 ct stone would be around 6.5 mm. Hence, this shows that as a diamond shows an increase in carat weight, it may increase in size too. 

Diamond Shapes 

Carat weight when examined from the perspective of a diamond’s shape can often be misleading or misunderstood since diamonds of equal carat weight can still express a sizable difference due to their shapes. 

Generally, carat weight is an undermined factor in fancy shapes like oval, emerald, marquise, and pear diamonds which appear larger than their weights in carat. This is mainly because of the extended silhouettes and large top surface which gives the illusion that the stone is bulky even though its carat weight might say otherwise. 

The one shape in diamonds where the carat weight and size are true to each other is the round diamonds. However, if we begin comparing a 1-carat pear-shaped diamond with a carat round diamond, then the pear will almost most definitely appear a lot larger. 

Therefore, fancy shaped diamonds are the best options for those who wish to incorporate a larger looking diamond jewellery in their collection while also ensuring that they save on the diamond and their pockets which could both be compromised if a larger carat weighted diamond in a simple shape is purchased. 


Carat weight is definitely a crucial factor in the pricing of jewellery studded with a diamond or other precious stones although other aspects such as the cut, clarity, and colour are also important. These four factors generally make up the 4 C’s of a diamond. 

The range of prices could fall anything between $500 to $10,000 or even more for mined diamonds when purchasing a diamond since all the above-mentioned factors are high variables. These prices, however, show a fall when customers decide on buying jewellery made of lab-grown diamonds since these diamonds even though show a 100% similarity in optical and physical properties with naturally-mined diamonds cost a lot lesser than the latter with a difference as high as 20-40%. 


Karat, a term exclusive for gold, is a form of measurement that aids in determining the purity of gold found in any item of gold jewellery like gold rings, necklaces, etc. Since it is used specifically for gold, no customer will find jewellery of platinum or other metals that is measured in karats. 

Fundamentally, karat talks about the amount of pure gold present in a piece of gold jewellery which means that higher the karat rating a jewellery piece has, higher is the quantity of pure gold present in it. 

Three basic karat ratings are found which are 14K, 18k, and 24K; out of which 14k is denoted to gold jewellery with the lowest amount of pure gold and 24K refers to pieces of gold jewellery made with 100% pure gold.

14 Karat 

A popular precious metal choice for brides and grooms, 14 karat gold is best suited for engagement rings and wedding bands, hence, making them a much-preferred choice by couples. 

Gold jewellery made by 14 karat gold is more durable and affordable when compared to their successors of 18 and 24 karat gold. With 58.3% pure gold, this durability is a result of the mixture of other metals found in such jewellery, leading to increased resistance to scratches and dents. 

Although the amount of pure gold present in jewellery made of 14 karat gold decreases, this allows the jewellery to be more durable and be available in different colours such as white gold, yellow gold and rose gold. 

White Gold 

White gold is very similar to platinum in appearance since both these precious metals showcase a silvery shade of colour. It is also highly compatible with various gemstones and is generally purchased by customers who want to experience the style and effect of platinum but do not wish to invest too much since platinum has always cost 30% higher than gold. 

Yellow Gold 

Yellow gold is generally made with a mixture of copper, gold, and nickel which results in the alloy expressing a warm yellow tint in its appearance and closely resembling pure gold. 

Also Read: How to determine the value of a Black diamond?

Rose Gold 

Rose gold is a fairly new addition to the trend with its gorgeous soft pink colour and neutral warmth in shade. Perceived as a romantic meal, it is a popular choice in engagement rings and complements various precious gemstones very well.

18 Karat

Another popular choice for customers, the 18 karat gold is famous for its own set of reasons, mainly since it has more pure gold present in its jewellery. With about 75% of pure gold making up an 18 karat gold jewellery’s composition, these result in appearing a lot more vibrant and rich in colour. 

It is also more suitable for customers with sensitive skin which could get triggered due to foreign metals and so for people with such skin, an 18 karat gold jewellery is a good choice since it is less likely to cause any allergies or side effects. 

However, the higher quantity of metal also leads to decreased durability and higher prices which could be heightened by a few hundred dollars when compared to jewellery made of 14 karat gold. One such example could be a solitaire ring which would cost $790.00 in 14k gold but will amount to $990.00 if bought in 18k gold. 

24 Karat 

The purest gold of them all, a 24 karat gold has no mixture present in its composition and a pure, non-alloyed form. It is also the rarest option out of the three and appears richly yellow, giving off a charmingly beautiful look which is mainly because of the high quantity of pure gold present in jewellery made of 24 karat gold. The only option available in 24 karats is yellow gold since a 24 karat white or rose gold cannot be found. 

Although this is a stunning form of precious metal, customers are often advised against purchasing or making engagement rings or wedding bands out of 24 karat gold since it is very soft and highly susceptible to scratches and dents. 24 karat gold is also a lot more expensive than their other two counterparts. 

Jewellery made of 24 karat gold is generally purchased as an investment since the value of such jewellery tends to always remain very high. 

Also Read: The Reason Of East-West Engagement Ring Hottest Style

Conclusion Thoughts

If a customer asks about which type of gold or diamond is best suited for them, jewellers and designers must always begin their advice in the matter with recommending the customer to first be completely aware of their personal preferences, likes, and dislikes in the area of discussion. Once aware of what they are actually searching for, customers can begin understanding the difference between karat and carat and decide whether they want to base their buying diamond on these factors or not. If they do, then this article is an excellent guide for the process of judging precious metals and stones based on their carats and karats! 


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