M Winther wrote on Sun, Jun 10, 2007 05:51 AM UTC:
I discovered that one can buy the Lewis chess pieces, at £98.95, here:
http://www.chessbaron.co.uk/chess-TH2001.htm
They are made of crushed stone. There is no stone board. But in the plaster cast set it's possible to make an attractive stone plaster board.
Marilyn Yalom ('Birth of the Chess Queen: A History') says that the set is from around 1200 when the Norwegians ruled the Isle of Lewis.
/Mats