The new resource confirms that Régua contains 4.47mln tonnes grading 0.27% tungsten trioxide (WO3).
The initial mining will focus on the higher-grade areas of the orebody close to the surface.
The company has now begun obtaining access to the ore via development drives.
To process the ore W Resources plans to build a plant with a capital cost of just €1.5mln.
In the initial trial mine operation, high-grade Régua ore will be processed using crushing, mill and spiral equipment to produce an 8-12% WO3 concentrate which will then be trucked to the company’s existing La Parrilla processing plant for upgrade to 60% WO3 concentrate and purification.
"This will be W's second tungsten mine to come on stream, following the start of production at La Parrilla at the end of last year,” said Michael Masterman, chairman of W Resources.
“It's great to kick-off mining and development of Régua, where we see significant synergies between La Parrilla and Régua with materially lower capital costs at the Régua plant site and increased La Parrilla final concentrate production.”