There are other Scandium projects Imperial Mining (IPG) trading at Can$0.08 has the Crater Lake advanced Scandium Project in Quebec. They already completed a Preliminary Economic Assessment.
Also, NioCorp (NB) trading at Can $9.00 after its recent 10-for-rollback with a Scandium pilot plant in Quebec. That Co has a standby credit offer of $800 million from the US Govt should they be able to go into production in Nebraska.
Metalex's claim is not even drill-tested. At this time, any JV agreement with Rio Tinto is a just a "dream" term sheet.
https://imperialmgp.com/