In the case of solitaires, a curved or convex cut is employed, whereas in the case of accent stones they are cut either uncurved or concave. Additional variations include the round-cornered triangular, modified shield cuts as well as triangular step cuts. The trillion’s unique style has great fire and displays sharp brilliance as long as the stone is cut to the correct depth.
Trillion cut diamonds are mainly used as side stones to compliment larger solitaire stones in engagement rings, although they can also make for a perfect solitaire stone by themselves considering their unparalleled brilliance and fire.
The trillion cut was initially developed in Amsterdam, although the actual design varied widely depending on the rough form of the original stone.
The Henry Meyer Diamond Company of New York designed and trademarked the modern Trillion cut in 1962, and over time the trillion became the generic name for all triangular brilliant cut diamonds.