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Trillion cut diamonds are uncommon as the center stone in an engagement ring but can look stunning as diamond accents in a three-stone diamond ring.
Because trillion cut diamonds are typically accent diamonds, there’s less of a need to focus on cut, clarity and color than with a center diamond. In general, it’s best to look for diamonds that are eye-clean and appear colorless in relation to their setting.
As always, we recommend buying trillion cut diamond jewelry from a reputable vendor. James Allen and Leibish & Co. both stock a reasonable range of engagement ring settings with trillion cut diamonds, all with excellent images and very competitive pricing.
A trillion cut diamond, also referred to as a trilliant cut, is a diamond that’s cut into a triangular shape. A typical trillion cut diamond will have three sides of equal length, with a flat table at its surface.
The trillion cut is a relatively contemporary diamond shape, with its modern history dating back to the 1960s. It’s often viewed as an adventurous and provocative shape, with an eye-catching, contemporary look that certainly stands out from the crowd.
Unlike most diamond shapes, the trillion cut is more commonly used for side-stone diamonds than for center stones. However, you can also find engagement rings that feature a trillion cut diamond as the center stone.
Below, we’ve gone into more detail on the shape and appearance of the trillion cut, as well as the history of this diamond shape. We’ve also shared our recommendations for purchasing an engagement ring with trillion cut diamond accents.
The trillion cut diamond is triangular, with three equal sides. Like the round brilliant cut, a trillion cut diamond has a flat table. The trillion cut is known for having impressive brilliance, great fire and an eye-catching, modern appearance.
Like other diamonds derived from the brilliant, trillion cut diamonds do a good job of hiding color and inclusions. When cut to a high standard, a trillion cut diamond can look absolutely stunning, either as a center stone or as an accent diamond.
Trillion cut diamonds can differ in cut and shape depending on whether they’re intended for use as center or accent stones.
When a trillion cut diamond is intended to be used as a center diamond in a solitaire ring, it will typically be cut to have 50 facets. Center trillion diamonds will also usually have a light curve or convex shape to maximize the diamond’s perceived size.
When a trillion cut diamond is intended to be used as an accent diamond — for example, as a side accent in a three-stone engagement ring — it will typically be cut with 31 facets and won’t have convex edges.
Thanks to its long sides, a trillion cut diamond can often appear to be larger than its true carat weight.
The trillion cut, as we know it today, was trademarked by the Henry Meyer Diamond Company of New York in the 1960s as the “trilliant” cut. However, early trillion cut diamonds are believed to have been cut in Amsterdam as long ago as the 19th century.
The trilliant name comes from the diamond’s shape — a combination of the words “triangle” and “brilliant.”
Over the years, numerous variations of the trillion cut have been produced, often with different shapes and facet counts. Because of the variation in cut between different trillion cut diamonds, it’s important to pay close attention to photos when you’re comparing diamonds in this cut.
Like other diamond shapes, trillion cut diamonds can vary hugely in price based on their color, clarity, cut quality and carat weight. Diamond prices increase exponentially with size, meaning you’ll pay significantly more per carat if you’re looking for a particularly large diamond.
Since most trillion cut diamonds are part of a setting, the price can vary based on the type of setting, the number of diamonds and the total carat weight.
Trillion cut diamonds are quite rare, especially as center stones. Few jewelry stores keep trillion cut diamonds in stock, with the notable exception of trillion cut diamonds used as accent stones in three-stone engagement rings.
If you’re buying an engagement ring that features trillion cut diamond accents, there’s not much of a need to obsess over the four Cs. Instead, focus on matching the center diamond to the side diamonds by choosing a center stone with similar clarity and color grades.
A three-stone ring with trillion diamond accents is usually the best choice. This offers the modern appearance of a trillion cut with a larger selection of center diamonds for you to choose from.
If you’re buying a loose trillion cut diamond, or if you specifically want a trillion cut diamond as a center stone, we recommend using the following tips:
Jewelry featuring trillion cut center diamonds isn’t particularly common. As such, most diamond vendors don’t stock loose trillion cut diamonds. However, engagement rings featuring trillion cut diamond accents are quite common.
James Allen and Leibish stock a small selection of three-stone engagement rings that feature trillion cut side diamonds. For example, this three-stone setting from Leibish & Co., this double halo setting or this hexagonal setting from James Allen both use trillion cut diamond accents.
If you’d like to buy loose trillion cut diamonds, or an engagement ring featuring a center stone in the trillion cut, it’s best to contact Abe Mor. They can help you view a range of trillion cut diamonds in your price range.
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