The term "sapphire crystal" may sound like something that's incredibly protective, especially when you consider the fact that sapphire is one of the hardest nature-made materials on Earth. But things are not always what they seem, as proven by the latest JerryRigEverything torture test with Zagg's pricey Galaxy S8 curved glass screen protector.

The $50 Zagg Sapphire Defense advertises that it's effective because it's infused with sapphire. And though it does offer traces of factory-made sapphire in the plastic, according to the report, it's not nearly as protective as the real thing. For comparison, JerryRigEverything shows off a Tissot watch and an HTC U Ultra with actual sapphire displays. They hardly scratch, compared to the Zagg Sapphire Defense, which seems just as effective as any other screen protector — or worse, when you consider that it claims to be made of glass.

Take it from us: If you want ample screen protection, any of of these case-friendly screen protectors will do for the Samsung Galaxy S8. Many of the entries even come in packs of multiples, so you can have a backup on the ready the minute you receive your first scratch.

Samsung Galaxy S8 and S8+

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