Tina Lilienthal, Gosha Atelier and Deci London also sign up.
CMJ Media is continuing to expand in the UK with the addition of five new clients, including London Jewellery Week.
The PR and marketing division of the Company of Master Jewellers said that it will work alongside London Jewellery Week managing director Della Tinsley to help the week attract sponsors and press coverage.
Tinsley said: “I am really pleased that we can draw on the resources and the professionalism of CMJ Media this year. We are confident that we now have a strong team in place to drive the event forward, both for this year and to build London Jewellery Week and a national Jewellery Week forward for the future.”
Other new CMJ Media clients include jewellery designer-maker retail website Expressions des Bijoux and jewellery designer brands Tina Lilienthal, Gosha Atelier and Deci London.
Carpin said: “Our rapidly expanding client list shows that there is a real need for companies to employ a PR and media company that really understands the UK jewellery market. Along with providing all the services that a traditional PR company can offer, CMJ Media can offer its clients additional marketing support based on our experience within the industry.”
Other existing CMJ Media clients include Gurhan, Marco Bicego, Mastercut Diamonds, Molly Brown London, Alexis Dove and The Company of Master Jewellers.