It's behind a pay wall, but if you copy the link then Google it you may bipass it...
"While brine-based lithium is cheaper to produce, sources have said Asian battery manufacturers have stated a preference for the higher quality lithium derived from hard rock assets, driving brine-based companies and upstream players to look at deals they would not have previously considered."
BGS Price at posting:
22.5¢ Sentiment: Buy Disclosure: Held