Meet the smartphone screen that’s made from ‘bulletproof’ glass OK, so you probably shouldn't try firing a rifle at your smartphone, even if it is wearing the new Holy Grail smartphone screen protector that maker Sir Lancelot's Armor says is made from "bulletproof" glass. **netheless, it does seem that the Holy Grail will give your gadgets the best protection around, provided you're willing to pay between $31 and $55, depending on the phone or tablet it's made for. However, Sir Lancelot's Armor CEO Jon Cyr puts this price into context by **ting that "fixing broken screens costs an average of $250." So really, the $31 you're paying for a Holy Gail smartphone screen is just insurance to make sure you don't have to pay more down the line.