The stonework , after the work is assembled loosely , is glued stone-by-stone to a substrate after having previously been `` sliced and cut in different shape sections ; and then assembled together so precisely that the contact between each section was practically invisible '' .
The stonework is glued stone-by-stone to a base after being `` sliced and cut in different shape sections ; and then assembled together so precisely that the contact between each section was practically invisible '' .