just so you know, not asking for anything here ...
mining for greenstones and "found greenstone" "found Mystery mineral" but do not always acquire these ....
player just stands there, wait for you to click on mineral pile again.
I checked the ground, inventory ... has happened 3 times on totally different days ... and not sure if all three on same mineral pile, at least two are the same ...
oh yea, only happend with mystery mineral find ....