The Diamond Setter brings decades of artistry and expertise to every creation — from bespoke jewellery design and heirloom transformations to exquisite engagement and wedding rings, and meticulous jewellery repairs. At the heart of this craft are Gavin and Lorraine Marsh, the passionate duo whose hands-on approach ensures every piece tells a story. Their “Meet the Maker” ethos celebrates the personal connection between jeweller and client, making each experience as unique and treasured as the jewellery itself.

Gavin is a highly skilled master jeweller and diamond and gemstone setter with over 20 years bench experience.

He worked in Hatton Garden creating jewellery for renowned brick and mortar high street brands. He also worked for Rolex at the case and bracelet department. A few years in between, he pursued the love for scuba diving and became an instructor before finding his way back to jewellery in New Zealand as a master jeweller and diamond setter for a renowned international brand.

In 2024, Gavin launched his first collection of Osmium jewellery making him the first in the UK to incorporate Osmium in jewellery.

Meghan is a budding jewellery designer with a passion for creating unique, wearable art. She has a keen eye for detail and a rare ability to listen closely to her clients, transforming their ideas into beautiful, personal treasures.

Her process begins by understanding each client’s vision—whether for a special occasion, a meaningful symbol, or a distinct aesthetic. She then carefully sketches and refines her designs, ensuring every element reflects the story behind the piece.

Committed to both craftsmanship and quality, Meghan designs jewellery that is not only striking but also durable and timeless. She has completed the Jewellery Essentials, Gemstone Essentials, and Diamond Essentials JET Program with the National Association of Jewellers, and holds a Level 3 Diploma in Jewellery Design and Manufacturing from the British Academy of Jewellery.

Outside of her design work, Meghan also runs a home-based dog-sitting service.

Operating on a small production means unnecessary waste are eliminated which are common in mass produced jewellery business.

The Diamond Setter works with precious metals supplied by merchants whose commitment to the environment is to only use recycled raw materials where possible and limit their impact on environment. Their discipline and processes adhere to UK's environmental regulations which are among the stringiest in the world. A closed recycle production is practiced in all aspect of the operation, including keeping of lemel and scrap.

No work is outsourced enabling us to support local talent as well as giving our customers the confidence that their jewellery stays in the premises.otion description appears here.