- A trillion cut diamond is a triangular-shaped stone with three equally straight or slightly curved sides. It’s found in two styles: curved and straight.
- Choose a trillion cut engagement ring based on the four cs, symmetry and market demand.
- A three-prong setting for a trillion diamond ring is best for minimum metal interference and maximum light exposure while a bezel setting offers the best protection for the stone.
What Is a Trillion Cut Diamond?
A trillion cut diamond is a triangular-shaped diamond with three equally straight or slightly curved sides. As a relatively modern addition to diamond cutting, it first gained popularity in the mid-twentieth century, primarily as accent stones. The trillion cut was developed in response to changing tastes in jewelry design—specifically, the desire for shapes that could offer innovative style, maximum brilliance and efficient use of rough diamonds. The trillion cut was crafted with a brilliant-style facet pattern—often featuring 31 or more facets—to ensure it could rival the sparkle of more established cuts.
There are two primary styles of trillion cut diamonds: curved and straight. The curved trillion cut features gently bowed sides, lending a softer profile to the diamond. This makes it ideal for both center and side stones in engagement rings. In contrast, the straight trillion cut is defined by sharp corners and straight edges, often with a step or mixed cut that gives it a geometric look. Straight trillion cuts are most used as side stones in multi-stone settings, where their clean lines add a contemporary feel to the overall design.
How to Choose a Trillion Cut Diamond
Choosing a trillion cut diamond is a balance of various factors, the most influential being clarity, color and symmetry. Due to their broad surface, inclusions and color tints can be more noticeable, so go with higher clarity and color grades if possible. The sharp angles of a trillion cut make symmetry especially important, as any slight imperfections in the facets can affect the overall sparkle.
Trillion Cut Diamond Price
Generally, trillion cut diamonds are priced similarly to round brilliants per carat, though pricing can vary based on the four cs—cut, color, clarity and carat weight—as well as symmetry and market demand. Their shallow depth and wide face-up appearance can make them seem larger than other stones of the same carat weight, offering excellent value.
Trillion Cut Ring Settings
The pointed corners of a trillion-cut diamond are vulnerable to chipping, so protective settings are recommended. Here are the two best ring settings for a trillion cut stone:
Three-prong setting: This style uses three prongs, one on each corner, to secure the diamond while showcasing its shape with minimal metal interference. This enables peak light exposure.
Bezel setting: A bezel setting encases the stone with a thin metal rim that follows its triangular outline. This provides excellent protection for the corners. Read more about the bezel style here.
Both settings suit solitaire and multi-stone arrangements, especially in trillion cut engagement rings, where the cut serves as a non-traditional center stone.
Shop our selection of trillion cut diamonds, including trillion cut diamond earrings, trillion cut diamond necklaces and trillion cut diamond rings—online at Borsheims.com.
