Liu took home his first Lonmin gong in 2009, with his Aeon earrings (pictured) and Allure ring.
Zoë Harding and Anna Loucah also prevailed in the Established Designers category, whilst Leyla Abdollahi, Alexander Davis, Anthony Roussel, Laura Strand and Sarah Ho were recognised as the best ‘Emerging Designers’.
Liu said it was “a great honour” to win the award for a second time, and added: “I feel it is important that we continuously push the boundaries of the materials available to us.”
The platinum-based competition is now in its ninth year, and is sponsored by platinum mining company Lonmin plc. The designers will unveil their winning pieces in September, when they will be displayed on the Johnson Matthey stand and worn by models at an awards party at the International Jewellery London show.