Harriet Marchioness Diamond Custom Cut Engagement Ring 18K Yellow Gold 30.00ct

Harriet Marchioness, the exquisitely composed 30.00 carat total weight Diamond Custom Cut Engagement Ring in 18K yellow gold, unites the drama of a bespoke-cut diamond with the noble warmth of rich gold. A spectacular custom-cut centre stone - shaped to your chosen silhouette and style - is set in the glowing embrace of yellow gold, creating a ring that feels both opulent and intimately personal. Worn alone as a golden showpiece or alongside a curved gold or diamond band, Harriet Marchioness evokes the quiet grandeur and refined presence of a modern titled heirloom.

The centre diamond’s custom geometry allows you to define the ring’s character, from bold and architectural to softly romantic, while expert setting work ensures security, balance, and exceptional light performance. The saturated tone of 18K yellow gold introduces warmth, contrast, and an heirloom character that deepens the richness of the overall design. Perfect for those who dream of an engagement ring with storybook nobility and completely bespoke detailing, Harriet Marchioness is a timeless blend of brilliance, elegance, and personal significance.

Please allow 2–6 weeks as each ring and custom-cut centre stone are individually designed and handcrafted. All of our rings can be crafted using GIA-certified diamonds and different materials; please enquire about bespoke yellow gold designs, custom diamond cuts, and UK-specific sizing.