Trillion-cut

Trillion-cut: A brilliant-cut gemstone that is triangular in shape rather than round with 44 facets.

The round center stone is a straight green, while the trillion-cut stone at left is a more yellowish green and the oval stone at right a slightly bluish green. Generally speaking, hue position is of less importance than saturation.

1st Place
John Dyer Precious Gemstones
Co. 20.74 ct. modified trillion-cut Aquamarine.
2.

See also: Tourmaline, Precious, Jewel, Aquamarine, Trillion