A word meaning money, which is typically used when said money is gained or lost unexpectedly and quickly. Stones is interchangeable with words such as bucks, dollars, and notes.
Félix Lengyel: *winning on slot machine* IT KEEPS GOING UP! *holds head* HOW MUCH?!
Friend: How much?! Oh mah gah, how much!
Félix Lengyel: *wins $120k* A HUNDRED TWENTY-THOUSAND STONES!!!
Friend: Ohhh, what the fuuu-