Phone intercepts key to robbery case against jeweller

Michel Elias Germani is accused of masterminding a robbery at his jewellery store in Sydney's CBD. (Dan Himbrechts/AAP PHOTOS) (AAP)

Police are still transcribing telephone intercepts they think can prove a Sydney jeweller was behind an armed robbery at his own store.

Michel Elias Germani, 65, is accused of masterminding a robbery at his eponymous jewellery store in Sydney's CBD in January, telling police two men threatened him and his employee with a knife, tying them up and demanding access to a safe.