4ct Lab Grown Diamond Engagement Rings

4ct Lab Grown Diamond Engagement Rings

A 4 carat diamond is extraordinary — a stone that commands attention in any room, on any hand, in any setting. Reserved for those who want the very best, a 4ct diamond engagement ring is the ultimate expression of love, commitment, and ambition. With a lab grown diamond, that level of brilliance is now within reach.

What is a 4ct lab grown diamond?

Lab grown diamonds are chemically, physically, and optically identical to natural diamonds — the same composition, the same hardness, the same breathtaking brilliance. Certified by the IGI and GIA to exactly the same standards as their natural counterparts, the only meaningful difference is the price. At 4 carats, that difference is extraordinary — a natural 4ct diamond of equivalent quality can cost many times the price of a lab grown equivalent, making a lab grown stone the clear choice for anyone who wants maximum impact without compromise.

A 4ct diamond measures approximately 10.2mm in diameter in a round brilliant cut, or around 13mm x 9mm in an oval — a stone that is unmistakably impressive in person, and unforgettable on the finger.

Our 4ct Lab Grown Diamond Ring Collection

Every ring in this collection is made to order in our Hatton Garden, London workshops, set with a hand-selected 4ct lab grown diamond in your choice of cut — round brilliant, oval, radiant, pear, emerald, and more. Each diamond is IGI certified and individually chosen for exceptional colour, clarity, and cut quality, ensuring a stone that performs brilliantly in every light.

Choose your setting, your metal — 18ct yellow gold, white gold, rose gold, or platinum — and your diamond, and we will craft your ring to your exact specifications.

Why choose Alan Bick for your 4ct lab grown diamond ring?

• Every diamond is IGI certified
• Handcrafted in our Hatton Garden, London workshops
• Available in every cut, setting, and metal
• Free resizing after your proposal, with no time limit
• Complimentary engraving
• Retail valuation for insurance included
• Exchange policy if your partner wants a different design
• Showrooms in London and Manchester — view diamonds in person before you buy

A stone of this scale deserves to be seen in person. Book an appointment at our London or Manchester showroom and our team will guide you through our 4ct lab grown diamond selection, helping you find the perfect stone and setting for the most important purchase of your life.