Ann: High Gold Recovery from Metallurgical Test Work at Youanmi, page-21

This seems to contradict what you're saying. It appears a small refractory portion. Yet to read in depth at this point.
Managing Director Alex Passmore commented: “We are very pleased
with these results, which are in line with our expectations. The main
lode ore body at Youanmi that was mined historically was renowned as
being refractory at depth. This first-pass metallurgical test work
demonstrates that different primary mineralisation styles within the
Youanmi project area such as the granite-hosted gold at Grace are
clearly non-refractory, delivering excellent recoveries with conventional
methods.”