Big Bang Theory Quote 10958

Quote from Bert in the episode The Wedding Gift Wormhole

Amy: So, do you know what it is?
Bert: Of course I know what it is. It's a silicon dioxide crystal, otherwise known as quartz.
Sheldon: Are you sure?
Bert: Am I sure? Is basalt a mafic extrusive igneous rock formed by the rapid cooling of magnesium and iron-rich lava? Yeah, I'm sure.

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