Which Diamond Shape Gives the Illusion of Being Largest? Discover the Best Cuts for Maximum Visual Impact

When choosing a diamond for an engagement ring or a piece of jewellery, size often plays a key role in the decision-making process. Diamonds come in various shapes, each offering a unique visual appeal and perceived size. While the carat weight of a diamond is an objective measure, certain shapes create the illusion of being larger than others. Understanding which diamond shapes can maximise the appearance of size can help you make a choice that provides the most impact for your budget.

In short: Marquise gives the largest face-up size for the carat weight (around 25% larger than a round of equal weight), followed by oval (15-18% larger), pear (12-15%), emerald (10-12%) and cushion (5-8%). The round brilliant has the densest profile, with most weight hidden in the pavilion. UK 2025 1.00ct lab-grown D/VS1 elongated cuts run £1,400-£2,200, versus £6,500-£9,500 natural.

Let’s explore which diamond shapes give the illusion of being largest, why some appear bigger than others, and how you can make the most of your selection.

Understanding What Makes a Diamond Look Bigger

When we talk about how big a diamond looks, we’re really discussing its face-up appearance – how large it appears when viewed from above. Several factors contribute to this perception, including the surface area, cut quality, and even the ring setting. Here are some key aspects that can affect a diamond’s apparent size:

• Surface Area and Dimensions: Diamonds with a larger surface area on the top (also known as the table) can appear larger than those with more depth. The more of the diamond’s carat weight that is concentrated towards the top, the bigger it will seem.
• Cut Depth: Diamonds can be cut to varying depths. If a diamond is cut too deeply, more of the weight is hidden below the surface, making it look smaller. Conversely, a shallower cut can give the appearance of a larger stone from above.
• Ring Setting: The way a diamond is set can significantly impact how big it looks. Settings that expose more of the diamond or use additional accent stones can make the central diamond appear larger.