Introducing Jessica McCormack, our latest member

Since launching in 2008, Jessica McCormack has quickly established itself as one of Britain’s most exciting jewellery houses – creating beautiful pieces that combine Georgian techniques and expert craftsmanship with modern-day design influences in its atelier in London's Mayfair. Here, we speak to Jessica McCormack CEO, Leonie Brantberg (above, right), to learn a little more about the brand.

Walpole: Tell us about the history of your brand… 

Leonie Brantberg: The story of the Jessica McCormack brand began with Jessica’s childhood in New Zealand where she grew up surrounded by antiques and artworks collected by her auctioneer father. This instilled in Jessica a belief that beautiful objects should be enjoyed every day rather than stowed away. After several years working in the Sotheby’s jewellery department, Jessica launched her own brand in 2008 from a small studio in Clerkenwell. Combining her sense of loving irreverence towards precious objects and a desire to reinvigorate antique jewellery making techniques, Jessica’s pieces quickly garnered attention from a loyal client early on

In 2013, we opened our flagship store at 7 Carlos Place. Set in a six-story Mayfair townhouse, the space’s relaxed atmosphere and artful decoration perfectly encapsulate the essence of the Jessica McCormack brand. Between 2023 and 2025, we opened a store on Sloane Street, our first concession in Harrods, and our first international store on New York City’s Madison Avenue.

As we continue to grow our business, it is important for us to maintain Jessica McCormack’s vision of exceptionally beautiful jewellery designed to be enjoyed as often as possible. This purpose strikes a chord with our predominantly female clientele, who remain incredibly loyal and champion the modern elegance and wearability of our pieces.

What is your brand best known for? 

Our brand is known for modern, wearable diamond jewellery: what we call “Day Diamonds”. We believe that diamonds are too precious to be worn only on special occasions.

What has been a significant achievement in your company’s timeline? 

Opening our first international store on New York City’s Madison Avenue in 2025 has been a significant milestone. We have loved getting to know our US clients better, and building a home away from home for them. We were also excited to sign our first brand ambassador, Zoe Kravitz, last year, who has been a long-time client and perfectly embodies the modern spirit of our brand.

 Why do you love the brand? 

I fell in love with Jessica McCormack when I came to buy a ring from her five years ago!. Like many of Jessica’s clients, the brand’s fresh, modern, and timeless approach to luxury really spoke to me. I loved the irreverence inherent in her designs and the lack of pretention. When I realised that Jessica McCormack had become the only jewellery I wanted to wear, I knew I wanted to be part of the brand.

Why does your brand represent the very best in British luxury? 

Jessica McCormack blends creativity and craftsmanship in pieces that fuse audacity with tradition. British design and luxury have long been synonymous with quality materials and steadfast attention to detail, while at the same time boldly pushing boundaries and being open to idiosyncratic approaches to elegance. We also actively support the preservation of traditional jewellery making techniques in the UK through our dedicated workshop apprenticeship programme.

What attracted you to becoming a Walpole member? 

Jessica McCormack has always stood for excellence in craftsmanship and design, values which closely align with Walpole’s objective to promote and protect British luxury. We were particularly drawn to the sense of community Walpole fosters among like-minded brands, as well as the opportunity to engage in meaningful conversations around the future of luxury, sustainability and innovation. We are proud to be part of a network that champions British excellence on the global stage.

Tell us about an exciting development or new launch for your brand in the coming months? 

With the success of our first store in New York, we are eyeing other international locations – watch this space.

jessicamccormack.com