ENGLISH
中文Triangle Cut History
Before talking about anything else, we should clarify that if you ever stumble upon the terms “trillion cut” or “trillian cut”, the information you find will actually be related to trilliant cuts. Some of the terms used can be “branded” trademarks or information that simply refers to a triangular brilliant cut diamond.
The trilliant cut was developed during and after World War II, but it was only patented in 1962 by the Henry Meyer Diamond Company with the trademark “Trilliant”. At around the same period of time, another diamond cutter called Leon Finker also designed and cut triangular brilliant diamonds under a trademark name called “Trillion”.
Due to the confusion between 2 phonetically similar terms “Trillion” and “Trilliant”, both of these terms lost their trademark status in the 1980s and the Trillion cut was subsequently rebranded to be called “Trielle” by Leon Finker’s family business.
Today, the original cutting technique is freely available for use by diamond cutters around the globe and this has led to different variations of the cutting style. Broadly speaking, the term brilliant-cut is used to describe gems that are cut with a triangular shape.
Features
The trillion cut is a triangular shape comprised of three equal sides and 31 or 50 facets depending on whether the diamonds are used as solitaires or accent stones.
For solitaires, a curved or convex cut is employed, whereas accent stones are cut uncurved or concave. Additional variations include round-cornered triangular, modified shield cuts and triangular step cuts. The trilliant’s unique style has great fire and displays sharp brilliance if the stone is cut to the correct depth.
Trilliant cut diamonds are most often used as side stones to compliment larger solitaire stones in engagement rings, although they also make for a perfect solitaire stone themselves considering their unparalleled brilliance and fire.
Proportions
| Triangle Cut | Excellent | Very Good | Good |
|---|---|---|---|
| Table % | 56% - 66% | 54% – 68% | 52% – 70% |
| Depth % | 35% – 46% | 34% - 48% | 33% - 52% |
| Girdle | V. Thin – Slightly Thick | Very Thin - Thick | |
| Culet | None | Very Small | Small |