Marquise Lab-Grown Diamond Side Stone Engagement Rings in 18K Yellow Gold Under £5,000

Yellow gold with a lab-grown diamond creates a warm, vintage-inspired look at an accessible price point. The traditional warmth of yellow gold paired with the modern value of lab-grown creates a ring that honours heritage while embracing innovation.

The marquise cut features a distinctive elongated shape with pointed ends, offering the largest face-up area of any diamond shape for its carat weight. Its boat-like silhouette creates a dramatic, regal presence on the finger and makes the stone appear significantly larger than other shapes of the same weight.