A promise that you'll love her yesterday, today and tomorrow, this purple amethyst and diamond three-stone framed engagement ring from past present futureâ® is a vibrant gift of love. Fashioned in cool 10k white gold the bright purple amethyst - the largest the 4. 6mm center stone - create a beautiful centerpiece. Adding brilliant sparkle, round diamonds frame the center trio and adorn the open loop shank. Inside the shank, the words "past present future" are set with two accent diamonds. This engagement ring shines with 1/4 ct. T. W. Of diamonds.