OD6 Metals (ASX: OD6) has wrapped up its CPC Optioneering Study—backed by ANSTO testwork—and selected a preferred process flowsheet for the clay-hosted rare earths at Splinter Rock. The decision lifts confidence that OD6 can produce low-impurity MREC/MREH products and moves the project into large-scale optimisation at ANSTO alongside the commencement of mining studies at the Inside Centre Deposit