I get some decent stuff sometimes- I'm pretty sure I got a big nugget once.
I got a few big nuggets and big pearls, and several regular nuggets and pearls. Then I go to the maniac in Icirrus City and make my money back. I just need to learn to go see him after every museum visit, because trying to sell nearly a hundred hard stones is a very lengthy process.
3DS Friend Code: 3351-4057-4675 (Vicki)
2DS Friend Code: 0361-7983-6340 (Breanna)
Friend Safari X (3DS): Vicki ~ Rock withOnix, Boldore & Shuckle Friend Safari Y (2DS): Breanna ~ Ice withDelibird, Bergmite & ???