Princess Cut Lab-Grown Diamond Vintage 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.

The princess cut is a square or near-square brilliant-cut diamond that offers exceptional sparkle in a modern, geometric profile. It retains more rough diamond weight during cutting than a round brilliant, making it a strong value proposition without sacrificing fire or brilliance.

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.

Under £4,000, natural diamond engagement rings become a strong option — 0.7ct to 1ct stones in classic solitaire or elegant halo settings. Lab-grown opens the door to 1.5ct–2ct showpieces.

Vintage rings with a 1ct lab-grown diamond start from £4,022

At 1ct, even lab-grown vintage rings start above £4,000.

Need help finding the perfect ring? Book a free consultation — our experts can work with any budget.

Pricing Guide

Princess Diamond Price Guide

0.50ct

Ring from

£4,006

0.70ct

Ring from

£4,007

1ct

Ring from

£4,052

1.50ct

Ring from

£4,185

2ct

Ring from

£4,430

Princess diamond prices updated daily. Book a free consultation to see diamonds in person at our Hatton Garden atelier.

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The princess cut engagement ring is a timeless style that never goes out of fashion. With sharp angles and clean lines that bring a contemporary elegance, princess cut diamonds have earned their place as one of the most popular fancy diamond shapes.

Discover our selection of princess cut designs or create your own through our ring builder. Explore solitaire and vintage settings in 18kt white, yellow, or rose gold, or platinum.

Princess Cut Lab-Grown Diamond Vintage Engagement Rings in 18K White Gold Under £4,000 — FAQs

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