Keras Resources plc announced assay results from samples taken from stockpiles for its 10,000-tonne bulk sampling metallurgical testwork programme at the Nayega Manganese (Mn) Project in northern Togo, which have returned average Mn grades of 41.15%, substantially in excess of budget. Highlights: Mn grades ranged from 39.61% to 42.76% with an average of 41.15%; the average Mn grade of 41.15% is 18% higher than the budgeted grade of 35%.