re: Ann: EVG Updates Results from San Gerardo... Plough: an S.G. of 2.5 is fine to work with: with significant levels of metallic minerals (eg 0.5% + Cu) you could bump that figure up a bit.
as a reference: felsic rocks have an SG of ~ 2.5-2.7, basaltic rocks have an SG of ~3.0
I have just topped up my holdings today at $0.175 in anticipation :)
cheers all