GT Advanced Technologies suffered a major setback last month when its scratch-resistant sapphire glass was left out of Apple's new large-screen iPhones.

Taiwanese sapphire glass related firms, namely, Crystalwise Technology, Tera Xtal Techonlogy, Procrystal Technology, Crystal Applied Technology, Rigidtech Microelectronics, and ACME Electronics are influenced by GT Advanced Technologies's bankruptcy, their share prices fell lately.

Source said that most of the applications of sapphire glass in Taiwan is mainly in LED, and Apple is still the key factor of all of the sapphire glass related components firms.