Trillion Cut Diamond

The Trillion cut boasts a unique triangular shape that not only looks stunning but also has the benefit of hiding inclusions well. It is known for its sharp brilliance and incredible fire. Read on to discover everything you need to know about it.

In short: The trillion (or trilliant) cut is a triangular brilliant with 31-50 facets and either pointed or rounded corners — originally designed in 1962 by the Asscher family. Aim for length-to-width 1.00-1.05 for the classic equilateral look. Commonly used as a side stone in three-stone settings (typically 0.10-0.50ct). Mohs 10 hardness; corners need careful prong protection. Lab-grown trillions run 60-80% below natural equivalents.

01

AN INTRODUCTION

The Trillion cut can also be referred to as the Trielle, Trillian, or Trilliant cut. It is a triangular shaped diamond with three equal sides. There are many variations of this cut available, including convex cuts, curved cuts, uncurved cuts, concave cuts, triangular step cuts, modified shield cuts, and round-cornered triangular cuts. This largely depends on whether the diamond is used as an accent stone or a solitaire.

02

FEATURES

The Trillion diamond boasts a triangular shape, with the ideal length to width ratio being 1.00. The number of facets varies, with some diamonds boasting 31 facets and others having 50 facets.

03

BUYING ADVICE

One of the main benefits associated with the Trillion cut is the fact that it hides inclusions well, which means you can afford to go for a lower grading. A lot of people opt for trillion diamonds as accent stones, yet they are becoming more popular as solitaires too.

When buying this stone, one of the most crucial factors to bear in mind is the depth, as this has a large impact on the brilliance and fire. Trillion diamonds can also appear larger than other diamonds of the same carat weight. Finally, it is advisable to ensure the diamond is set in V-prongs, as this unique shape can be more difficult to set.