Rêve Diamonds is a bespoke diamond jewellery supplier established in 2013, specialising in custom engagement rings and fine diamond pieces. Based in Mayfair, the company operates from Hanover House on Hanover Square, with showrooms also in New York and Los Angeles. Their in-house Hatton Garden workshop hand-finishes rings in platinum, 18k gold and rose gold. The supplier offers over 200,000 loose natural diamonds, lab-grown options, and coloured gemstones including sapphires, emeralds and rubies. Standard pieces dispatch in 3 to 5 business days; bespoke configurations take 2 to 2.5 weeks. All diamonds ship with GIA, HRD or IGI certification and complimentary insurance valuation. Lifetime resizing, polishing and prong checks are included at any showroom.