What details on the quarry do you have.........Just thinking out loud, but I'd presume you know the type of rock involved; its strength, hardness, crushability, clay content etc etc. Have you a specific market to aim at??; ie. say if it's for local infrastructure then you'd have to have various testing carried out to determine suitablity (not sure how applicable this would be to Romania, but with the onset of european funding.......then maybe this something else which would need consideration)