Stones

Not Derelict Sunday worthy, it is newly built.
For our current project we are looking for stones to be used for a straight, man-high wall and smaller, but curvy walls. We also need stones or anything else for the terrace. Of course it should fit togethers, colour-wise.
Today we went to two stone/concrete factories to see their products in use, giving a better idea than looking at a catalogue (on paper or on screen). We were not quite successful, we will continue our quest.