Chase Mining Corporation Limited announced that the most recent report from the University of New South Wales ("UNSW") contains quantifiable results and a major processing breakthrough in the production of mullite fibre from Torrington sourced topaz concentrate: Separable mullite fibre is being produced (Ultimate aim of the research programme); Topaz being fed into the furnace no longer requires grinding or pelletising (Cost saving); and Lower furnace operating temperatures are now possible (Cost saving). Previous reports have suggested that mullite whisker formation is possible at only specific calcination conditions: (1) at elevated temperatures (1600°C), (2) following milling of topaz, and (3) pressing topaz into pellets. These conditions were considered to facilitate vapour-solid interactions during the conversion from topaz to mullite. It also was concluded that retention of the vapour (SiF4) at elevated temperatures assists the formation of mullite whiskers. Milling was assumed to enhance gas formation and uniaxial pressing was assumed to enhance the vapour retention. The present work reports studies of calcination of as-received (minus 1mm) topaz without milling or pressing while enclosed as an alternative approach. This has the advantage of facilitating vapour (SiF4) retention within the topaz sample being calcined. The present results suggest that pure, separable, mullite whiskers can be produced from as-received minus 1mm topaz concentrate from Torrington packed as a loose, but enclosed bed at temperatures lower than 1600°C in 2 hours. Compared to previous experimentation, the present work reports data for the conversion of as- received topaz (not milled) in a loosely packed bed using an enclosed crucible arrangement. The calcination was done at 1400°-1600°C for 1-3 hours using relatively rapid feed rates (70-120 sec over a 54 cm transit distance). The samples were examined by field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD).