My first two tables were large circular tables without a semi-precious focus stone.  The first two used used wagon wheel rims for the edges, but they are too expensive for most people now.

 I still make that kind of table and show two recent examples here where I have made my own simulated wagon wheel rims from thin strips of steel with a patina like the antique wagon wheels.   

I had 2 36" diameter i/2 circule cut out of a large sandstone and used one of them and bits and pieces of the leftover stone to make Arches (above).  I had so much fun organizing bits and pieces into patterns that I made the table below with the rest of the leftover pieces.  The gradation from large pieces to small was intentional.  I study space phyics in my day job.  The pattern  reflects a turbulent process that converts large scale plasma structures to smaller ones...hence the name Turbulence.  

Turbulence is for sale on ww.wkpaccenttables.com.  I'll deliver it for free to any street  addrress in Coloradol