I'm not gonna answer directly, but try this reference:...

I'm not gonna answer directly, but try this reference:
http://www.mining.com/web/lithium-supply-demand-story/

There's a table at the bottom that allows you to convert any lithium compounds into lithium..once you got an idea of the actual Li you can the compare it to other Li company's grade in their announcement (e.g: AVZ, GXY, etc)..
I think grade is significant factor in Li play but don't for get the gross volume as well...is a bit of combination...low or medium grade but high volume could be as attractive as high grade low volume...

Hope this helps