
l, uh, went back to the CRYSTAL.
Breaking Bad Season 4, Episode 7

and I damn sure didn't say
anything about no CRYSTAL.
Breaking Bad Season 2, Episode 3

Oh, i-it's just this
dumb CRYSTAL wand
The Big Bang Theory Season 12, Episode 2

And this is a high-pulse laser
with a BBO CRYSTAL.
The Big Bang Theory Season 12, Episode 22

It's a silicon dioxide CRYSTAL,
otherwise known as quartz.
The Big Bang Theory Season 12, Episode 2