This already a "$500m market cap" cry seems seems a bit overdone if you ask me.
EV (ie taking into account cash in the bank) is closer to $400m.
Given the quality of the mineralization (size and grade), low level of nasties, seemingly competent rock strata, likely low extraction cost and exploration potential (Nova and beyond), I can't see why we have to walk around with the mental blocker of it "already being a $500m company".
SIR Price at posting:
$2.10 Sentiment: Buy Disclosure: Held