On a more pedestrian scacle... There are some extremely smooth and round objects available for ornamental purposes. Finnish company Sorvikivi [0] has been maki

On a more pedestrian scacle... There are some extremely smooth and round objects available for ornamental purposes. Finnish company Sorvikivi [0] has been making such granite balls for 20 years, and their products are so accurately manufactured that the balls can be supported by a hydroplane between the ball and an equally smooth support bowl. I remember seeing one of their products at the lobby of a hotel. Because the ball was effectively floating on water, you could rotate it by hand. And we did. [0]: http://www.sorvikivi.com/eng/index.html http://www.sorvikivi.com/eng/index.html