I'll show you how we used to do that at home. So reluctantly they brought a hammer, and they were curious whether I would want to chip away a corner. Now go and polish it at once so that I can see it. And so we decided to use onyx. We fixed the quantities and brought the stone.
Artistic expression is a manifestation of the unity of design and mateial.
In the great epochs of cultural history this was done by architects as a matter of course and, no doubt, without conscious reflection. Less is More. Precedents in Architecture. Van Nostrand Reinhold, 1985. The Details of Modern Architecture.