Lily's brow furrowed as he started to talk about moonstone falling form teh sky, and she shook her head slightly. "Ours come from mines, I believe." Though where they came from before that, she wasn't completely sure. "I believe they're simply naturally occurring in nature. Like diamonds and other precious stones."
It was almost shameful how little she actually knew about the origins of so many of the ingredients she used daily. How much she took for granted. But she was fairly certain they were mined, and then ... powdered for potions.
"It doesn't ... fall from the moon though. They just call it moonstone because of the way it reflects light back and shimmers like it does."