look at Amity's kitchen. I found one posting about it, but I think there are more.
http://ths.gardenweb.com/forums/load/kitchbath/msg1102220129891.html

Also, look at the very large square stone tiles sold by Kate-Lo tile distributors. Designed to cover an entire countertop front to back, if I remember correctly. And there are spacers sold that are 1/16 in depth (but not for floor use).

Wonderful transformation, tintin, and a really nice use of materials. Congratulations.

My only disappointment is that no one in any of your photos was modeling the trademark Tintin hairdo. Cheers.

I used a 24" polished porcelain tile with ss edging from http://www.schluter.com/139.aspx

It has been extremely durable and looks authentic.