GT Advanced Technologies Inc (NASDAQ:GTAT)’s shares are up 7.73% to $15.90 following a report in ETNews.com that said sapphire is beginning to be used as Smartphone cover glass in earnest, and that growth of related downstream industries is anticipated. GT and Rubicon both make sapphire components. Rubicon shares are up 6.68% to $7.99.Sapphire is considered more durable than tempered glass. GT Advanced Technologies Inc (NASDAQ:GTAT) … Continue reading Hot Stocks: GT Advanced Technologies Inc (NASDAQ:GTAT), Rubicon Technology (NASDAQ:RBCN), Yingli Green Energy (NYSE:YGE), LDK Solar (OTCMKTS:LDKSY), Suntech Power (OTCMKTS:STPFQ)