I usually start here to start my initial assessments of the viability of mining operations that are mentioned: http://mines.findthedata.org/l/8735/Red-Arrow http://mines.findthedata.org/l/7858/Ruby-Trust-Mine http://mines.findthedata.org/l/7408/Golden-Wonder I have to drop offline. There has been some good discussions on this topic if you search back on the posts over the last year or so.