Trilliant cut

Introduction and History of Trilliant Cut

The trilliant cut was introduced by the Asscher brothers in Amsterdam.
Leon Finker created his version of the triangular brilliant cut diamond, called the trillion cut.
Henry Meyer Diamond Company also cut triangular brilliant diamonds, but their stones were cut slightly differently.
Henry Meyer referred to his diamond cut as trilliant, while Finker called his cut trillion.
Marvin Finker, son of Leon Finker, patented the cut and trademarked the term Trillion.

In 1986, a federal court judge ruled that the words Trillion and Trilliant were phonetically equivalent.
The term trilliant, being a concatenation of the generic term triangular brilliant, could no longer be a registered trademark.
Finker introduced their patented cut as Trielle and TRIELLE in a stylized design.
After losing the trademark, the term trillion cut became used for all triangular-shaped gems.
GIA uses the terms triangular brilliant and triangular modified brilliant for non-branded diamonds.

The straight edged trillion cut is usually used as accent gemstones.
It displays sharp brilliance and fire when cut to the correct depth.
The ideal length to width ratio for this cut is 1:14.
Straight edged trillion cuts are commonly used on either side of a main, larger stone in a ring.
Good scintillation can be achieved with this cut.

Reference	URL
Glossary	https://harryandcojewellery.com.au/blogs/glossary/trilliant-cut
Wikipedia	http://en.wikipedia.org/wiki/Trilliant_cut
Wikidata	https://www.wikidata.org/wiki/Q7842015
Knowledge Graph	https://www.google.com/search?kgmid=/m/0f1gw3