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.
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
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.
