Back in March, an MIT report suggested that Apple and other smartphone manufacturers could potentially switch to sapphire crystal displays rather than the standard Gorilla Glass displays currently in use. As it turns out, Apple has already experimented with sapphire screens. In an interview with German news site Tages-Anzeiger [Google Translation], Vertu COO Perry Oosting revealed that Apple investigated the possibility of a sapphire display, recruiting an unspecified number of Vertu employees to work on the project