When buying or selling a diamond, the cut is one of the most important—and often misunderstood—factors to consider. While many people assume “cut” refers only to a diamond’s shape, it actually speaks to how well a diamond has been crafted to reflect light. The cut directly affects how brilliant a diamond appears—and plays a major role in its value.
Whether you’re purchasing a piece for a special occasion or considering selling one, understanding the different diamond cuts can help you make a smart, confident decision.
What Does “Cut” Really Mean?
In gemology, “cut” refers to a diamond’s proportions, symmetry, and polish—how precisely the stone has been shaped from its raw form. Unlike color or clarity, which are based on natural characteristics, cut is determined by human craftsmanship. A well-cut diamond reflects light beautifully, maximizing brilliance and fire. According to the Gemological Institute of America (GIA), the cut is the most complex and technically difficult of the 4Cs to analyze.
Even if a diamond has excellent clarity and color, a poor cut can make it look dull. On the other hand, a high-quality cut can make a smaller stone appear more brilliant and lively.
Popular Diamond Cuts and What Makes Them Unique
Here’s a look at some of the most well-known diamond cuts and what they bring to the table:
- Round Brilliant
The most popular diamond cut worldwide, the round brilliant features 58 facets precisely arranged for maximum sparkle. It’s the most studied and refined cut, often considered the gold standard in brilliance and fire.
- Princess Cut
A modern square-shaped cut known for its sharp corners and incredible sparkle. It’s the second most popular cut after the round brilliant and a favorite for engagement rings.
- Emerald Cut
This rectangular cut uses step-cut facets, giving it a hall-of-mirrors effect. While it doesn’t sparkle as much as a brilliant cut, it emphasizes clarity and offers a sleek, elegant look.
- Oval Cut
An elongated version of the round cut that gives the illusion of greater size and elongates the finger. Its brilliant-style facets ensure plenty of sparkle.
- Cushion Cut
Also known as a “pillow cut,” this shape features rounded corners and larger facets, offering a vintage charm with a soft, romantic feel.
- Marquise, Pear, and Heart Shapes
These “fancy” cuts stand out for their unique silhouettes and bold personalities. While not as common, they’re perfect for those seeking something distinctive.
Why Cut Matters When Selling
Cut quality isn’t just about aesthetics—it can significantly impact your diamond’s resale value. Buyers and appraisers often place more weight on brilliance and fire than sheer size. A diamond with an “Excellent” or “Ideal” cut grade will typically command a much higher price than one with a lower grade, even if they share similar carat weight and color.
Before selling, it’s wise to have your diamond evaluated by a professional who understands how cut influences value—especially in today’s market where savvy buyers know exactly what to look for.
Finding the Right Cut (and the Right Buyer)
At Frank Pollak & Sons, we’ve been New York City’s trusted diamond experts since 1905. Whether you’re buying a stunning new piece or looking to sell your diamond jewelry, our knowledgeable team is here to offer expert guidance, fair evaluations, and a seamless experience. Visit our Fifth Avenue location or contact us at 1(800)-342-3878 today to explore the true value of your diamonds—cut and all.