Indian state-run Minerals and Metals Trading Corp. (MMTC) has proposed some project developments for the gem and jewellery sector, reports The Economic Times. It plans to set up a special economic zone (SEZ) either at Haryana or Gujarat. The SEZ site has to yet to be fixed upon, basis its proximity to an international airport and labour laws. It also proposes to set up a training centre for the labour. MMTC is also looking to set up a chain of warehouses and a commodity exchange.