That recognition must've been so important for her, specially coming from Nagi, to stand and feel like she's in the same level as the other 3, so good for you!
I know of an old dried up river close by but it's full of vegetation and there isn't any registry of precious gems around here... or more like I wouldn't know where to find such information so going in blindly isn't going to be very fun, just because there is a river, inactive or not, doesn't mean there will be shinny stones
