Diamond workers in Surat are calling for an indefinite protest to seek a salary hike and fulfillment of other demands.The workers are demanding higher wages, establishment of a welfare board, and compensation for families of diamond polishers who died by suicide.The diamond industry has been facing challenges, resulting in a slump in demand and financial difficulties for the workers.The union is also seeking the implementation of strict labour laws and exemption from professional tax for the polishers.