Two out of three versions of Apple have sapphire glass screens . Test showed how durable the material made from synthetic crystals is . Endured being sanded , keyed , rubbed , struck by a hammer and drilled .
Two out of three versions of the Apple Watch have sapphire glass screens . Test showed how durable the material made from synthetic crystals is . Endured being sanded , keyed , rubbed , struck by a hammer and drilled .