Cast Crystal

What kind of crystal is best to use when shattering it with the unamplified human voice?

I'm doing an extra credit project for my physical science class and I was wondering if anyone could give me the best specific type of crystal that is best to use. For example - should it be lead crystal? Or a different kind? Answers will be greatly appreciated.

Public Comments

1. Doing this with an unamplified human voice is very hard, no matter what you use. Basically, you'll need the thinnest, mosy fragile design you can find, and a very powerful diaphram. Did you see the episode of Mythbusters where they did it? They found a professional singer who could do it, but only after trying a couple dozen different glasses. As far as what kind of crystal, I'm afraid I don't know that. But ultimately, this will be much easier with an amplification system.