Discover the charm of British-designed jewellery from Gemma J, a brand born from a deep love for the outdoors and animals. Founded by Linsey, a designer with over 30 years of experience, Gemma J Jewellery offers unique pieces that blend classic and contemporary styles.ollections are a celebration of the natural world, with a special focus on equestrian and animal themes. Each piece is designed to capture the spirit of the countryside and the animals we love.