It only mentions the silver as examples. The stuff they use is using palladium. Unlike silver, it produces tons of the bands that blocks it from fracturing li

It only mentions the silver as examples. The stuff they use is using palladium. Unlike silver, it produces tons of the bands that blocks it from fracturing like silver. But the interesting part isn't the material used, but the demonstration of how to make glass thats stronger then steel. So now they just get mixing/playing and see which cheap material is best to do this with.