7 Things to Know About the Trillion-Cut Diamond

If you’re looking for an unusual diamond shape with lots of fire, look no further. The trillion-cut diamond, also called trilliant, has a unique triangle shape combined with a brilliant-cut diamond’s flat top and sparkling facets. The name is actually a portmanteau of “triangle” and “brilliant.” This combination makes it an excellent choice for people looking for a non-traditional shape who don’t want to sacrifice sparkle. Designers use trillion-cut diamonds in many different types of jewelry, including engagement rings, bracelets, necklaces, and stud earrings, so you’ll be able to find the perfect piece to add to your collection.

1. There Are Two Types of Trillion-Cut Diamonds

While all trillion-cut diamonds have a triangular shape with three sides, usually of equal length, there can be slight differences. The sides can be straight, creating a very graphic look, or they can be slightly rounded, which softens the look and makes it look a little larger.

2. Trillion-Cut Diamonds Make Beautiful Accent Stones

An engagement ring with a central trillion-cut diamond is unusual, but many designers feature them as side stones. They add a gorgeous sparkle, and the tapered edges suit most settings. Trillion-cut diamonds are especially striking next to square or rectangular stones. This Brent Neale Gypsy ring uses two trillion-cut diamonds to flank an emerald-cut diamond. The triangular shape is even more striking when set in yellow gold.

3. This Shape Can Appear Larger Than its Carat Weight

Trillion-cut diamonds are typically moderate-to-shallow diamonds, so they appear larger than diamonds with a deeper cut because more of the diamond is visible from above. In addition, the long sides can give the appearance of being larger than it is, so a trillion-cut diamond is perfect for people who are looking for a big look on a budget.

4. Combine Two for a Modern Take on a Toi et Moi Ring

A Toi et Moi ring combines two stones, one representing you and the other your beloved. Designers use an open setting that curls around the finger in traditional Toi et Moi rings. However, if this setting doesn’t suit your personal style, two trillion-cut diamonds make a gorgeous graphic statement, and the design is as unique as your love. KatKim’s Highland ring is a perfect example. It features two 5mm trillion-cut diamonds set on both sides of a gold band with pavé diamonds.

This type of design keeps the romantic notion of a Toi et Moi ring but has a minimalist modern look. Designers also use trillions in classic bypass rings, including Eva Fehren’s Reflexion II ring.

5. It Makes a Unique Engagement Ring

It’s uncommon to find an engagement ring with a central trillion-cut diamond, so you’ll be sure to stand out in the crowd. The geometric shape suits many different settings, including bezels, halos, and solitaires. Some designers find a romantic notion in its shape. Belgian jewelry designer Dries Criel says, “For me, trillions and its three sides represent past-present-future. It’s a reminder of the circle of life and especially the timelessness of fine jewelry and the part it can play in somebody’s life.” Criel uses three bands of pavé diamonds that connect to a floating trillion-cut diamond in this gorgeous ring, further emphasizing the idea of past, present, and future.

6. Replace Round Diamonds with Trillions for an Unexpected Look

Anita Ko uses trillion-cut diamonds in several designs, and the triangular shape completely changes the look of classic styles. In bracelets, she uses them in two different ways. A pavé cuff is even more glamorous with three trillion-cut diamonds set among the shimmering stones. Replace round diamonds with trillions in a tennis bracelet or eternity bracelet, and you’ll have a design that’s sure to stop people in their tracks.

7. They Are an Excellent Choice for “Floating” Diamonds

Designers love to use trillion-cut diamonds in settings where the diamond appears to float. The flat edge of the triangular shape fits neatly alongside the ring’s band. A hidden setting underneath supports the diamond, but it looks like it’s floating on your finger. KatKim’s Trillion Peak ring and Jemma Wynne’s Bespoke ring are perfect examples. Anita Ko even uses a floating trillion-cut diamond to add sparkle to a Cuban link necklace.