Sterling Silver with 1ctw Lab Created Moissanite 3-Stone Past, Present & Future Engagement Anniversary Promise Ring. Celebrate your engagement or anniversary with this stunning sterling adjustable in size ring featuring a total of 1ctw of round brilliant cut lab created moissanite, symbolizing the past, present, and future of time spent together. Each moissanite sits nestled in a swirling half bezel setting and has overall VVS1 clarity and D color. A rich shine and tapered band lend luxury and wearability to this special ring. It is available in size 6,7, and 8.