Why You’ll Love It The Marquise Flow Engagement Stack pairs a curvy marquise-cut lab grown diamond solitaire with a curved half infinity band set with lab grown diamonds. Designed to sit perfectly together, the flowing curves create a balanced, elegant silhouette. Each ring can also be worn separately, offering versatility beyond the stack. A beautiful blend of movement and brilliance, this engagement stack feels modern yet timeless — crafted entirely with lab grown diamonds.