Earlier this month, the Fool's Steve Symington made the case for why Apple's (NASDAQ:AAPL) iPhone 6 won't feature a sapphire display when it's released later this year.

But in the interest of truly Foolish investing, he's decided to take some time in the following video to highlight a recent analyst's report that indicates Steve might be wrong. Or at least half wrong, anyway. 

Specifically, Steve's talking about KGI Securities analyst Ming-Chi Kuo, who recently stepped out with a comprehensive report on Apple's plans for the remainder of 2014. More pertinent in this case, however, are Kuo's remarks on Apple's iPhone 6, in which he cites supply-chain sources who say Apple ultimately intends to switch completely from Corning's (NYSE:GLW) Gorilla Glass to GT Advanced Technologies' (NASDAQ: GTAT) sapphire to cover future iPhones.

The catch? Even given the recent reported ramp at GT Advanced Technologies' new Mesa, AZ facility, Kuo suggests supply constraints may limit sapphire covers this year to only Apple's high-end iPhone 6 model. In short, while supply constraints were Steve's primary near-term concern, he hadn't accounted for the possibility that Apple might be willing to restrict sapphire's expanded role to just one higher-end device.

So what would this mean for investors in Apple, Corning, and GT Advanced Technologies? To hear Steve's full take, including what this says about GTAT's guaranteed capacity versus actual production volumes, please watch the following video.

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.