She's right, magnesium is difficult and expensive to remove at...

She's right, magnesium is difficult and expensive to remove at an industrialized scale as it requires the use of conventional cation-exchange reagents like D2EHPA and Versatic 10 which even of you can get a hold of the quantities needed it eats away the margins quickly. I have heard others talk about mica content being the death knell of GXY production but really its not that big of a hassle to reduce as we have established processes as its a common impurity to other resources. Not saying that removal of magnesium is always going to be an issue as this industry is still young but for the time being I wouldn't bet the farm on seeing anything revolutionary within my investment window.