Metallurgical test works at both the Batu Hitam and Batu Mas Prospects have detailed that:
• Average Gold recovery = 94% (range 88%-98%)
• Average Silver recovery = 95% (range 90%-100%)

Detailed Results of Lakuwahi Metallurgical Test work
Metallurgical tests are the first in a series of tests that will lead to the selection of the optimum process flow sheet for the Lakuwahi ore. The results are positive in that they clearly indicate that the near-surface Lakuwahi ore is free milling and that it will not require expensive treatment options such as a floatation and pressure oxidation process. It should be noted that the ores treated at Billiton's gold mines on nearby Wetar Island (Kali Kuning and Lerokis - now mined out) were also free milling and achieved very high gold and silver recoveries with a very simple and relatively inexpensive plant. Based on the Lakuwahi results to date, there is reason to expect that treatment of Lakuwahi ores will be low-cost, allowing the profitable mining and treatment of low grades.

Historic Exploration
Recognising geological similarities to their gold-barite mines on Wetar Island, Billiton explored and drilled the Lakuwahi prospect in the late 90s. Despite clear indications of a very large mineralising system and an 80 percent hit-rate in scout drilling, historic low metal prices and a corporate move away from gold found Billiton discontinuing the exploration programme.

Timeline of Romang Exploration
1989: Ashton Mining Recognised Lakuwahi as a follow up target but no further work undertaken 1998-99: Billiton heli-magnetometer / Radiometer, Soil Geochemistry, Geological Mapping 1998-99: Billiton; 14 scout holes for 2,424 metres. All holes intersected alteration / mineralisation 2000: Billiton pulled out of gold exploration and Indonesia low commodity prices & political turmoil 2006: PT GBU Granted five General Survey KPs 2008- 2010: ongoing: Robust Resources extensive drilling program with four rigs operational at July 2010 2009-2011: Geological Mapping, Induced Polarisation (IP) Resistivity, Ground Magnetometer, Bulk Sampling.

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