4 Carat Diamond Rings: Price and Buying Guide

A high-quality, 4 carat diamond is an incredibly rare find. Although we may hear carat weights thrown around in conversation, seeing a 4-carat diamond in real life is truly a sight to behold. The average carat weight for an engagement ring in the U.S is 1.00ct which gives you an idea of just how significant a 4-carat diamond is. A remarkable feat of both mother nature and the skill of man, purchasing precision cut 4-carat diamonds requires a thorough understanding of diamond quality and a realistic approach to your budget. This expert guide will help you to make the best choices for your diamond.
4 Carat Diamond Engagement Ring
4.156 Carat Diamond Engagement Ring

What is a 4 Carat Diamond?

The ‘carat’ describes the weight of the diamond, with one carat being equivalent to 200mg. It can be difficult to comprehend ‘size’ from carat weight. Different diamonds shapes and the overall cut quality will both affect how big or small the diamond appears.
Diamond Size
In terms of national and international averages, a four-carat diamond is considered a ‘big’ diamond. In the right setting, it is an excellent carat weight for engagement rings and every day jewelry, but is also impressive enough to be reserved for evenings and occasions.

How to Choose a 4 Carat Diamond Using the Four C’s

We believe that no matter what carat weight you choose, selecting a diamond with suitable grades is essential. However, it is perhaps even more important to scrutinize color and quality in diamonds with a bigger carat weight – the bigger the diamond, the less forgiving it will be.


If we set aside personal preference and budget for just a moment, our recommendation for color grades in 4 carat diamonds would be an H or above. An H color diamond is in the middle of the ‘near colorless’ range and the presence of any yellow/brown hues tend to be imperceptible to most people. The increased surface area in 4.00ct diamonds can emphasize yellow tones in lower grade diamonds, so we would not suggest going lower than an H.


A VS2 would work beautifully with a 4-carat diamond. In a VS2 diamond, inclusions are only visible with a jeweler’s loupe at 10x magnification. Take full advantage of our 360 video and high res images for a detailed analysis of your diamond. Going beyond a VS2 will give exceptional clarity, but be prepared for big price differences as you get towards Flawless and Internally Flawless. Diamonds of this weight and this clarity are extremely rare, and this is reflected in the price.


Cut is the most important quality feature in a diamond and will have the greatest impact on price and appearance. Go for the absolute best cut you can afford and prioritize this over the other four C’s (if necessary). We offer all of our customers the opportunity to really familiarize themselves with diamond Cut across our education pages as we know it can be a tricky area to grasp. We created our A CUT ABOVE® brand of super-ideal cut diamond to prioritize cut quality and light performance. It is only with an exceptional cut that the stunning attributes of brilliance, scintillation and fire can be unleashed.

Certification (the 5th C)

Do not be tempted to stray from the leading gem laboratories. The GIA and AGS are the top tier labs who give accurate and consistent grades across the board. They add value to a diamond and protect you from over spending on a low-quality diamond with inflated grades. Both labs are consumer focused with extensive information regarding the grading process.
Need help choosing a diamond? We have GIA and AGS trained diamond experts on hand to help. Use our live chat service to speak to a professional today.

A CUT ABOVE® and Beyond

Status is intrinsically linked with diamonds; they are entirely entwined with luxury. Much like an exceptional sports car with all mods, many people want a diamond that has all the power under the hood and all the bells and whistles to go with it.
Our A CUT ABOVE® collection is the engine – the technical aspects that make these diamonds sensational. However, we created our Collection Series for those who demand the best of the best. These diamonds are at the top end of color, cut and clarity. A 4-carat diamond that earns the A CUT ABOVE® title and is part of the Collection Series is a rare find indeed, but when they come around, they are some of the most beautiful diamonds in the world.

4 Carat Diamond Prices

A realistic starting budget for a 4-carat diamond would be $50,000. This J-VS2 round brilliant is a good base point and is a beautiful diamond. It is perhaps a few color grades out of the ‘colorless’ range, however in a warm setting and with such a fantastic cut it would still deliver in all areas.
As you reach the upper echelons of four carat diamonds and move into Collection Series quality stones, a budget of around $250,000 would be suitable. As mentioned, these diamonds are extremely rare and get snapped off the market very quickly, however if you are looking for a diamond of this quality and cannot see one available online, please do not hesitate to contact us so that we can assist your search.

4 Carat Diamond Settings

We usually advise our customers to simply go with their heart when it comes to choosing an engagement ring setting, however things are a little different for a four-carat diamond. Not all settings can accommodate for a diamond this size and not all styles are suitable.
4 Carat Diamond Engagement Ring
4.205 Carat Diamond Engagement Ring
Fortunately, we work with the best in the industry so anything is possible. This beautiful Benchmark solitaire setting with diamond melee can comfortably hold a 4-carat diamond securely. The diamonds on the band are a G in color so they will give a dazzling white sparkle.
We stock a collection of settings that are suitable for a 4 carat diamond but we are also happy to work on bespoke settings if required.

Be Inspired By Our Designer Engagement Rings

Find the perfect Designer Ring for your special diamond by clicking the links below, and let us build the ultimate ring for the love of your life!