Oh, you forgot your QUARTZ.
The Big Bang Theory Season 7, Episode 13
this tourmalinated QUARTZ
that we got in the lab.
The Big Bang Theory Season 7, Episode 13
Okay, so it's QUARTZ.
The Big Bang Theory Season 12, Episode 2
And that stone in front--
I bet it's QUARTZ.
The Big Bang Theory Season 12, Episode 2
It's a silicon dioxide crystal,
otherwise known as QUARTZ.
The Big Bang Theory Season 12, Episode 2