Systematic Gem and Mineral Hall, Carnegie Museum of Natural History, Oakland.
A group of teenage boys is gathered around a case containing fluorite from Illinois. One clutches a digital camera:

Guy #1: Dude, I don’t care if you get a picture of the rock — I just want the color of the rock. What are you doing? No. Just fuckin’ fake it. There. I don’t need you to take any more.
Guy #2 with Camera: I would give a leg for you.

— Overheard by Zyzzy