Buyer's Guide: Pricing a 4 Carat Diamond Ring


Stepping into the world of 4 carat diamond rings is like entering a realm of pure luxury and extravagance. These magnificent stones, with their substantial size and dazzling brilliance, captivate admirers and exude an aura of opulence. While smaller diamonds may sparkle, a 4 carat diamond commands attention with its unparalleled presence. Yet, navigating the intricacies of 4 carat diamond prices requires careful consideration. In this guide, we'll delve into the nuanced world of these exquisite gems, exploring what sets them apart and how to make a savvy investment in a 4 carat diamond ring.

Understanding a 4 Carat Diamond’s Size

When discussing a "4 carat diamond," we're actually talking about its weight rather than its physical proportions. Carat weight acts as the standardized measure for diamonds, with each carat equivalent to 400 milligrams or 0.4 grams. However, it's important to recognize that a diamond's size isn't solely determined by its carat weight, especially how we tend to view a diamond’s size. The diamond's shape and cut exert a considerable influence on its relative size. For example, let's explore the diverse measurements (in millimeters) of various 4 carat diamonds:

4 carat diamonds

Round - 11 x 11 mm
Oval - 11.5 x 9.5 mm
Asscher - 10.5 x 10.5 mm
Marquise - 15 x 7.5 mm
Pear - 13 x 8.5 mm
Princess - 10 x 10 mm

Different shapes and cutting styles can significantly influence the perceived size and visual impact of a 4 carat diamond. If you were to view physical examples of all 6 of these sample 4 carat diamonds, it’s unlikely that you’d think they all came in at the 4 carat size.

4 carat marquise diamond

4 carat radiant diamond

4 carat pear diamond

4 carat emerald cut diamond

How Much Does a 4 Carat Diamond Ring Cost?

The price of diamonds is shaped by a multitude of elements encompassing cut quality, clarity, color, and whether they're natural or lab-created. However, the pricing mechanism for 4 carat diamonds reveals unique intricacies when compared to smaller counterparts (like 1 to 1.5 carat diamonds). Instead of a straightforward increase, the cost of a 4 carat diamond rises exponentially due to its heightened scarcity, surging or fluctuating demand, and the considerable quantity of rough diamond necessary for cutting.

Consider the following price differentials* (sample prices as of 2024):

  • Natural Mined - G, VS1, Excellent:

    • 1 carat: $7,000
      2 carats: $35,000
      4 carats: $150,000

  • Lab Diamond - G, VS1, Excellent:

    • 1 carat: $2,000
      2 carats: $6,000
      4 carats: $28,000

As you can see, projecting the cost of a 4 carat diamond by merely doubling the price of a 2 carat stone or quadrupling the cost of a 1 carat stone is inaccurate due to the non-linear escalation in pricing.

The cost of a 4 carat diamond ring can vary widely, ranging from $50,000 to over $500,000, depending on factors like shape, cut quality, clarity, and color. With each diamond possessing its own distinct qualities, careful scrutiny of these factors becomes even more essential as carat weight increases.

diamond rings ranging from 1 to 4 ct

How Does Shape Affect 4 Carat Diamond Prices?  

The price of a diamond is heavily impacted by its shape, as certain shapes are associated with higher costs due to their popularity and visual characteristics. For example, round brilliant cut diamonds are consistently among the priciest options, valued for their classic look and stunning sparkle. On the other hand, fancy-shaped diamonds like emerald, cushion, and marquise cuts often provide more affordable alternatives, with price differentials ranging from around 10% to 30% when compared to round brilliant cuts of similar quality and weight.

Emerald cut diamonds, known for their elegant step-cut facets and rectangular shape, are often priced around 10% lower than round brilliant cuts. Despite their sophisticated appearance and unique allure, emerald cuts tend to offer a more affordable option for those seeking a larger stone.

Cushion cut diamonds, with their soft, rounded corners and brilliant faceting, are another popular choice. These diamonds typically come at a price point approximately 15% lower than round brilliant cuts. While still offering exceptional sparkle and visual appeal, cushion cuts provide a cost-effective alternative for those with more budget considerations.

Marquise cut diamonds, characterized by their elongated shape and distinctive pointed ends, offer a unique and eye-catching appearance. Compared to round brilliant cuts, marquise cut diamonds can be priced approximately 30% lower, making them an attractive option for those seeking a larger stone while keeping costs lower.

4.7ct emerald, 4.5ct emerald, 4ct radiant

Focus on These Features When Selecting a 4 Carat Diamond  

When considering a 4 carat diamond investment, prioritizing cut and clarity is fundamental to choosing a high-quality and visually striking gemstone. A meticulously crafted cut not only enhances the diamond's brilliance but also ensures optimal light reflection and dispersion, elevating its overall allure.

As the carat weight increases, the significance of the cut becomes even more pronounced. Each facet must be precisely aligned to maximize the diamond's sparkle and scintillation, creating a captivating display of light and brilliance from every angle.

Similarly, clarity plays a crucial role, particularly with larger diamonds like a 4 carat gem. The expanded surface area makes any inclusions or blemishes more apparent, underscoring the importance of selecting diamonds with minimal imperfections and an eye-clean appearance. Diamonds in the VVS1-VS2 clarity range offer exceptional clarity and visual purity, enhancing the diamond's overall aesthetic appeal.

Additionally, considering the diamond's color is essential for achieving the desired aesthetic and value. Opting for diamonds within the G to I color range ensures a colorless or near-colorless appearance, ideal for maximizing brilliance and fire. However, for those seeking a warmer hue or intending to set the diamond in yellow or rose gold, J or K diamonds can provide a charming and complementary touch.

Design Considerations for 4 Carat Diamond Rings

When designing the perfect setting for a 4 carat diamond, it's essential to strike a balance that enhances the stone's impressive size while complementing its inherent beauty. Classic settings like solitaire and halo designs are particularly well-suited for showcasing the diamond's grandeur, just keep in mind that such a large stone will benefit from more secure setting features like a wider or thicker band.

With such a substantial gemstone size, 4 carat diamonds create a show stopping solitaire engagement ring. In our Esther, we paired a vintage-inspired style with a pavé-set twisted band, a floral basket, and a stunning 4 carat round brilliant cut diamond.

To create a glorious spread of diamond sparkle, a three-stone setting is a breathtaking setting for a 4 carat diamond. For Faye, we found a gorgeous 4 carat cushion cut diamond and set it with two brilliant trapezoid cut diamonds on either side, all in a smooth platinum band for the epitome of elegance.

Halo settings accentuate the size and sparkle of your center stone, making a 4 carat diamond appear even more substantial. We use a halo setting in Alva, complete with double prongs and a diamond studded split shank for a sophisticated vintage look.

As with any diamond, 4 carat diamonds are perfect for unique settings as well. With Evette, we placed a stunning 4 carat emerald cut diamond at the center and brought in subtle design elements like leaf prongs, milgrain on the prongs and a rhodium finished band for an unconventional yet gorgeous look.

By following this guide’s advice on quality and craftsmanship, you can navigate 4 carat diamond ring pricing with confidence. Follow your preferences and you’ll end up with an engagement ring that radiates sophistication and lasting beauty.


1, 2, 3 & 4 Carat Oval Diamond Rings


Get started designing a ring with us.


Shop 4 Carat Engagement Rings