Have you ever seen a trillion-cut diamond or gemstone engagement rings? (And don’t worry, we’re not talking about the number—aka these rings are very much affordable.) Trillions are triangular diamonds or gemstones with three sides of equal length, and can come in different cuts (rose or brilliant cuts, for example).

They’re often used as side stones to accent larger round or rectangular center stones—but these three-point stunners actually look gorgeous as the center of attention, whether they’re set asymmetrically in a cluster of stones or resting alone on a simple gold band. Below, see 20 different trillion-cut engagement rings that are whimsical, modern and just plain cool.