Lab-Grown Diamond Side Stone Engagement Rings in 18K White Gold Under £4,000

Lab-grown diamonds are chemically, physically, and optically identical to mined diamonds. They have the same crystal structure, hardness (10 on the Mohs scale), refractive index, and thermal conductivity. The only difference is their origin — grown in a controlled laboratory environment in 6–10 weeks rather than formed over billions of years. Lab-grown diamonds are typically 60–80% less expensive than equivalent natural diamonds, allowing you to choose a larger, higher-quality stone within your budget.

Bright, modern elegance at an accessible price. 18K white gold contains 75% pure gold alloyed with white metals such as palladium or silver, finished with a rhodium plating for a bright, reflective white appearance. It offers the elegant look of platinum with a lighter weight.