By Takashi
This page which is based on the information from 'THE UNIVERSE(THE SKY)=SORA' is made by HONO who is one of the fellows of THE UNIVERSE(THE SKY)=SORA.
The marble of Duomo(Italy)
http://sora.ishikami.jp/image_dir/index.php?id=20080721231120
http://sora.ishikami.jp/image_dir/images/2008/20080721231120.jpg
The different colored marble is cut by describing circles or curves and there is no slit at all.
What was more, the surface was finished slippery in the era when there was no polishing machines.
It is impossible to dig the marble.
Is it possible for today's people to make such a thing by using the machine of high technology?
http://slicer93.mbsrv.net/88-1003.html