Diamond spotlight: trilliant cut

Diamond spotlight: trilliant cut

Diamond spotlight: trilliant cut

This week we’re zoning in on the trilliant cut diamond. The trilliant cut is a triangular-shaped diamond, with its name combining the words “triangle” and “brilliant.” There are many things to consider when jewelry shopping for a trilliant cut diamond, such as vulnerability and symmetry.

You may have seen trilliant cut diamonds used to accent the center stone of a ring, but they can also be the main stone to make a diamond ring more unique. If you’re looking for a diamond that will stand out in a crowd, the trilliant cut may be the perfect shape for you. Your private jewelers in Omaha are here to tell you everything there is to know about this alluring shape.


Unlike the radiant cut diamond which only has one name, the trilliant cut has a few variations. Over time it has also been known as the trillion, trillian and trielle cut. The reason for several terms is that, throughout time, the diamond merchants trying to trademark a name had problems with the name having already been applied to any diamond cut into a triangular shape. Now, all these terms can be used interchangeably to describe the diamond. 

You may be familiar with the Asscher cut diamond created by the Asscher brothers. The Asscher brothers actually created the first triangular-shaped diamond in the 18th century as well. Their design inspired the briolette and Old Mine triangular cuts. In 1962, the New York-based diamond merchant, Leon Finker created the newest version of this shape, the trilliant cut.


There are many benefits of having a trilliant cut diamond on your ring. Because of their sharp brilliance and great fire, they hide inclusions and color well. This shape in particular looks larger than other shapes of the same carat; this is due to the shallow cut and large face-up area, which is 12% bigger than all other shapes except the marquise cut.

If your bride has an outgoing sense of style, you should consider a trilliant cut diamond for your engagement ring because of its uniqueness and striking appearance. You can get the big diamond look she’ll love for a great price. Many will say the pros outweigh the cons when it comes to this cut.


As your private jewelers in Omaha, we want to make sure you have all the advice you need when it comes to purchasing a trilliant cut diamond. It is important that this stone is properly mounted on a ring with V-shaped prongs or a bezel. This will help protect the fragile corners from being vulnerable to chipping.

To ensure this diamond sparkles as it should, more cleaning is necessary. Since the cut is shallow and has less depth than other cuts, it can be dimmed by just a little bit of dirt or dust. This shape can be hard to find, but if you’re set on a trilliant cut diamond, it’s worth the effort to find one of good quality.

No GIA quality grade

The Gemological Institute of America does not provide a grade for trilliant cut diamonds. This is because of the uniqueness and complexity of this cut. What this means is your personal preferences determine your choice. Below are three features to consider when selecting this shape.

  1. If you are choosing a trilliant cut diamond for the center stone on the ring, it should have 50 facets. If you’re using this cut for accents, it should have 31 facets.

  2. The diamond should be symmetrical; all three sides should be of equal length and the surface should be flat.

  3. Other guidelines to consider are proportions; the depth should be 32-48%, the table 50-70% and the length to width ratio should be 1.00 to 1.10.

Come see your private jewelers in omaha

When it comes to buying a trilliant cut diamond, we’re here to help. It’s best to work with a customer jeweler, as most companies don’t carry the trilliant shape. We want to ensure you have a ring you’ll love. If you’re interested in finding a trilliant cut diamond, come see us!