Prasiolite (Green Amethyst) Straight Drilled Faceted Trillions measure approximately 5x5x5mm to 8x8x8mm in size, have a vitreous luster, superior faceting and exceptional polish, well matched for tone on strand, the shapes are symmetrical, and the transparent quality of the stones with the expert faceting reflects a high level of brilliance in the light mint green hued gemstones.