The majority of diamonds are round brilliant cut. Other shapes are referred to as "fancy cut" stones---gemstones as well as diamonds. There is a lot of information about each cut, so today I want to share what I've learned about one cut: the triangular cut---trilliant, Trillion, Trielle, Trillian, Troidia and Trillium! Some triangle cut diamonds have sharp corners—fragile, vulnerable to chipping—while others have clipped corners. Sharp cornered triangle cut diamonds can use specially molded V-shaped prongs (like a marquise) and clipped corner triangle cut diamonds can use standard prong designs.
Originally designed and patented by the Henry Meyer Diamond Company of New York in 1962, the patent has now lapsed and that is why "trilliant" is used as a generic term for triangular shaped diamonds.
Trilliant Cut is a variation of the modern brilliant cut with 44 facets. The stone is step cut on the crown and brilliant cut on the pavilion. This cut has triangular shape with very sharp and pointed edges. An overall depth of 32% to 44% said to be the best for great brilliance.
|Moussaieff Red Diamond, Trillion Cut|
The Moussaieff Red is one of the famous trillion cut red diamond. It weighs 5.11 ct diamond and is regarded as the largest Fancy Red diamond ever rated by the Gemological Institute of America.
This triangular cut diamond was created and patented by the Trillion Diamond Company. It is trademarked by the Trillion Diamond Company. Every Trielle diamond is an equilateral triangle with 50 facets---41 facets on the table and culet, plus nine girdle facets.
Trillian, Troidia and Trillium are examples of other names for triangular cuts.
Since laser technology allows a multitude of shapes, triangle cut diamonds can be equilateral (all three sides are the same length), isosceles (two sides have the same length), or even scalene (none of the sides have equal length). For maximum brilliance, an equilateral triangle is best.