What Diamond Shapes Are Most Prone to Chipping? (And How to Protect Them)

Diamonds have earned a reputation for being nearly indestructible, and to a certain extent, that's true. They're the hardest natural material on Earth, ranking a perfect 10 on the Mohs scale of hardness. But that doesn’t mean diamonds can’t chip or crack. Hardness and toughness are not the same thing. A diamond is incredibly resistant to scratching, but it can still chip or fracture if it's struck at the wrong angle.

Every diamond shape has areas that are naturally stronger and areas that are more vulnerable. Some have sharp points that can chip if they're left exposed, while others have rounded edges that are less easily damaged. This doesn't mean shoppers should avoid certain shapes, but rather that they should be set with the proper type of protective setting.

If you're shopping for an engagement ring or any piece of diamond jewelry that you'll wear regularly, understanding which shapes are more prone to chipping can help you make a better decision for everyday durability.

Why Diamonds Chip in the First Place

Before comparing shapes, it's helpful to understand why diamonds chip at all. Although they are incredibly hard, diamonds have what's known as cleavage planes, which are natural directions within the crystal where it is slightly weaker. A sharp impact in just the right spot can cause a small piece of the diamond to break away. This isn't common during normal wear, but it can happen if the diamond strikes a countertop, a tile floor, another piece of jewelry, or any other hard surface with enough force. The areas most likely to chip are usually the thinnest or sharpest parts of the diamond, which is why you should consider shape when shopping.

Marquise Diamonds

Marquise shaped diamonds are one of the most vulnerable because they have two pointed ends, and both tips are susceptible to damage if they aren't properly protected. If the ring hits the edge of a countertop, the tip can chip. Fortunately, this is also one of the easiest problems to prevent. Most marquise diamonds are set with V-prongs that wrap around each point to protect the diamond better than a regular round prong. As long as both tips are protected, marquise diamonds can hold up very well during everyday wear.

Pear Shaped Diamonds

Pear shaped diamonds have a rounded end with a single sharp point. Like a marquise, the point should almost always be protected by a V-prong. When properly set, pear shaped diamonds are perfect for everyday wear because the concern isn't the shape itself, but whether it’s properly protected.

Heart Shaped Diamonds

Heart shaped diamonds actually have two areas that are vulnerable: the pointed bottom of the heart, which should be set with a V-prong, and the indented section at the top of the heart. It is less prone to breakage, but this shape requires setting by an experienced jeweler. 

Princess Cut Diamonds

The princess cut diamond is one of the most popular engagement ring shapes, but they also have one of the most obvious vulnerabilities. Unlike a round diamond, a princess cut has four sharp corners, which can chip if they're left exposed. Fortunately, most modern settings already account for this and the corners are usually protected with prongs that extend directly over each point. As long as those prongs remain secure, the risk of chipping is minimal. This is also one reason it's important to have your prongs checked at least once every six months. If one becomes loose or damaged, one of those corners may become exposed without you realizing it.

Trillion Diamonds

Trillion diamonds feature three pointed corners, making them another shape that deserves careful setting. They're often used as side stones, but all three corners require a V-prong to protect the weak spot.

Emerald and Asscher Cuts

At first glance, emerald and Asscher cuts look like they should be extremely durable because they have clipped corners, and for the most part, they are. They have a geometric look without the vulnerable corners. One of the reasons both shapes are so popular is that they are considered more durable than square cuts with sharp corners.

Oval Diamonds

Oval diamonds are one of the safest choices when durability is a priority. Because the entire outline consists of smooth, rounded curves, there are no sharp points that can be easily chipped. This doesn't mean an oval diamond can't be damaged, but the shape itself has fewer vulnerable areas.

Cushion Cut Diamonds

Cushion cuts combine square or rectangular proportions with softly rounded corners. Those rounded corners provide a durability advantage over princess cuts, but still have a similar overall shape. Many people choose cushion cuts because they like the balance between geometry and softer lines. 

Round Brilliant Diamonds

Round diamonds have earned their reputation for both popularity and durability. With no corners or pointed tips, they have the least amount of vulnerable areas of any diamond shape. This is one reason round diamonds have remained the most popular engagement ring choice for generations. Their exceptional brilliance often gets the attention, but their durability is another huge advantage that we should be talking about more.

Does the Setting Matter More Than the Shape?

In many cases, yes. A vulnerable diamond shape that's protected by an excellent setting is often safer than a more durable shape placed in a poorly designed setting. V-prongs and bezel settings are incredibly important in protecting exposed areas of the diamond. Even the height of the setting can make a difference. A diamond that sits high above the finger has more opportunities to bump into hard surfaces than one that's set lower.

Regular inspections also matter. Prongs naturally wear over time, and a loose prong may leave a corner unprotected without the wearer noticing. Having your ring inspected every six months or so can help catch small issues before they become expensive repairs.

Lifestyle Matters

Your daily routine matters just as much as the diamond shape itself. Someone who works at a desk all day may never have an issue with a marquise or princess cut diamond. Someone who works in construction, healthcare, landscaping, or another hands-on profession may want to choose a more protective setting or simply avoid wearing their jewelry at work. How you wear your jewelry is often just as important as what you choose.

Final Thoughts

No diamond shape is completely immune to chipping, but some are naturally more vulnerable than others. Shapes with pointed tips or sharp corners, like marquise, pear, princess, heart, and trillion diamonds, simply benefit from a little extra protection in the setting. Meanwhile, rounded shapes like round, oval, and cushion cuts have fewer weak points and generally offer greater everyday durability.

At the end of the day, you shouldn't choose or avoid a diamond shape based on durability alone. A properly designed setting, regular inspections, and a little common sense during everyday wear go a long way toward protecting any diamond. If you choose a shape you truly love and have it set by an experienced jeweler, there's every reason to expect it to remain beautiful for decades to come.