A fire of unknown origin broke out today in Apple’s command center in Mesa, Arizona.

Local firefighters responded at around 11:30 Tuesday morning to the structure, which formerly held sapphire glass supplier GT Advanced Technologies.

A Mesa fire spokesperson said the flames seemed to be localized to the roof of the building, near Signal Butte Road and Elliot Road.

Apple and its former sapphire supplier GT Advanced Technologies have stayed quiet about their disastrous relationship, but newly unsealed court documents reveal that the two companies never had a chance of making things work.

Judge Henry Boroff ordered the sealed documents to be opened on Tuesday, and one of the affidavits from GTAT CEO Daniel Squiller claims Apple used a “bait-and-switch” strategy that was massively one-sided. When GTAT balked at Apple’s terms, execs were told to stop trying to negotiate and “put on your big boy pants and accept the agreement.”

According to a new report from Digitimes, U.S.-based GT Advanced Technologies will be supplying sapphire screens for the eagerly anticipated 5.5-inch iPhone 6.

Based on Digitimes’ research, GTAT has 2,500 crystal-growing furnaces and mature crystal-growing processes that would allow them to produce enough sapphire to produce 45 million 5.5-inch covers in 2015. Cost-wise these are likely to come in at around $30, which Digitimes suggests will be a competitive price for a 5.5-inch sapphire cover in 2015.