What is the Most Expensive Diamond Cut?

Jun 12 2025 0 comments

A Complete Guide to Diamond Shape, Price & Value

When choosing a diamond, one of the most important decisions is the cut. But did you know that cut also has the biggest impact on price?

So, what is the most expensive diamond cut?

Answer: The Round Brilliant Cut is the most expensive of all diamond shapes. Let’s explore why.

Why is the Round Brilliant Cut the Most Expensive?

1. High Rough Diamond Wastage

To cut a round brilliant diamond, up to 60% of the original rough diamond is lost. That means more of the precious material is sacrificed to achieve the ideal proportions and symmetry.

In contrast, fancy cuts like emerald or cushion preserve more of the original rough, which makes them more economical.

2. Maximum Sparkle from 58 Facets

Round brilliants are engineered with 58 precision-cut facets. These facets are calculated to optimize light reflection (brilliance) and light dispersion (fire), making round diamonds the most sparkly of all.

Other cuts like emerald or asscher, while elegant, offer more subtle light return.

3. Greater Demand

More than 60% of all engagement rings sold feature a round diamond. Because of this sustained global demand, prices for round diamonds remain consistently higher.

4. Premium Cut Grading

Most gemological labs — including GIA and IGI — assign cut grades only to round diamonds, not to fancy shapes. This official grading standard gives buyers more confidence, which boosts demand and price.

Diamond Cut Price Comparison

Here’s a general look at how different diamond cuts compare in cost per carat:

Price Comparison by Diamond Cut (Approximate Cost Per Carat)

Diamond Cut	Relative Cost	Popularity	Sparkle Level
Round Brilliant	⭐⭐⭐⭐⭐ (Most Expensive)	Most Popular	Maximum Brilliance
Princess	⭐⭐⭐	Popular in modern styles	High
Cushion	⭐⭐	Vintage lovers	Soft, romantic
Emerald	⭐⭐	Art Deco, elegant	Subtle flashes
Oval	⭐⭐⭐	Trendy and elongating	High brilliance
Pear	⭐⭐	Unique and elegant	High brilliance
Asscher	⭐⭐	Geometric, vintage	Moderate
Marquise	⭐⭐	Regal and unique	High
Radiant	⭐⭐⭐	A combo of emerald & brilliant	Intense
Heart	⭐⭐	Romantic statement	High sparkle

Prices will also vary based on carat weight, clarity, and color, but the round brilliant remains the most expensive shape across all grades.

Is It Worth Paying More for a Round Cut?

If you’re looking for a timeless, versatile, and sparkling diamond, the round cut is a beautiful investment.

cusion ring

However, if you want to save money while still getting a dazzling look, consider alternatives like:

Oval cut – gives a larger appearance and excellent brilliance
Radiant cut – combines sparkle and shape beautifully
Cushion cut – offers vintage charm and great value

Round Floral Vine Engagement Ring

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Emerald & Oval Toi Et Moi Engagement ring

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Oval With Triangle Three Stone Engagement Ring

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Oval Solitaire with Full Eternity Engagement Ring

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Oval Halo with Luxury Engagement Ring

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Oval Solitaire with Calliope Bezel Floating Engagement Ring

Final Thoughts from KRK Jewels

The most expensive diamond cut is the round brilliant, thanks to its unmatched sparkle, popularity, and cutting precision.

But you don’t have to overpay for brilliance. At KRK Jewels, we offer a range of diamond shapes — including lab-grown round brilliants and Moissanites — so you can get high-end beauty without the high-end price.

Ready to find your perfect diamond? Explore our collection today.