Rainbow ---- worlds high grade TREOA sample of the mineralised material was analysed by SGS South Africa using mineralogy and gravity separation techniques. The rare earth elements in the head sample were predominantly Ce (24 %), La (14 %), Nd (7 %) and Pr (2 %). The mineralogical analysis revealed that the material consists of two main minerals: bastnaesite, (Ce,La)CO3F; and monazite (Ce,La,Th,Y)PO4. Bastnaesite accounted for nearly 59 % of the mineral composition, and monazite for a further 29 %. Rare earth elements were only present in these two minerals. -------- Even this is Light dominate. Northern Minerals is aiming for 190 tpy of Dy. But it's 20k tpd and Bokan @ 1500 tpd, is 100 tpy Dy.