Tungsten and gold producer W Resources has announced the first production of tungsten concentrate from its La Parrilla Tailings project in Spain.Initial output followed the completion of the testing and commissioning of the pre-concentration and concentration plants. "Testing of the pre-concentration plant has confirmed its capability to produce sufficient material to meet the concentration plant input capacity, and stockpiles have been built up in advance," the company said.La Parrilla is located in the Extremadura region of southwest Spain. The historic mine resource of La Parrilla, estimated by SRK in 2008, is 36m tonnes at 0.09% WO tungsten trioxide (WO3), "making it one of the largest tungsten deposits in the western world", W Resources said.The company said it would take three to six weeks to "fine tune" operations before ramping up to full production rates.The stock was up 1.6% at 0.94p by 08:30.BC