Stones & Homes.
 

I frequent the shop in Bogenera, as it is the best place to buy various alchemy ingredients. I sometimes find stones there, and as I'm building my house, I purchase them. Earlier, I went to add them to my house, and found that the river and mountain stones would not be added onto the house.

Why is this? They look identical, and basically are, aside from their lighter weight. Shouldn't they also be able to be part of the house?

Yes, but Stefan never reads things from here.

No they are different, those stones are stones from rivers which can be used for alchemy, while the stones in the mines are made for house building
Basicly we don't want that people abuse the mined stones for alchemy stuff

I suppose you also don't want it to to be so easy to get stones for homes, then, eh? :p

Okay, thanks for explaining.