Hi GT,
Correct to some degree...key points, as per your note:
1. Most
2. Needs to be purified
ie - There a lot's a G plays out there now that have proven that they are able to purify their G to Battery grade...the big differences are:
1. How much purifying and what are they using to do it with = at what cost?
2. Are those results derived via Lab tests or Demo Plant/ Commerial Plant?