The Joyalukkas store launch is one of the first public appearances for the star since the announcement of his separation from wife Sussanne.
Speaking at the event, Roshan said: “Joyalukkas is a global brand with a customer base of over 10 million people worldwide. Additionally, Joyalukkas jewellery offers consumers the world’s biggest choice of exquisite jewellery designs from around the world, created by expert award winning craftsmen.
“I am very proud to represent this superbrand on a global level. The brand stands for choice, latest trends, convenience, value and trust and it is this dedication that has helped them become one of the largest jewellery retail chain.”