I saw a friend's post on facebook tonight and had to share it with you.
A company over in Michigan called The Granite Fly makes fly tying bases out of various shapes and sizes of granite. I think this would be a pretty neat accessory for either tying at home or out in front of audiences.
Check out the website and definitely check out the Galleries http://thegranitefly.com
(I am not endorsing, soliciting, or getting anything by pimping this company, I just thought it was a novel concept)