On Sun, 12 Apr 2009 02:04:40 GMT, (Doug Miller)
wrote:

In article , bryan wrote:
I know that concrete retaining wall stones will eventually crack (or
worse) if I use the to build a fire ring.

So I will use brick.

Is all brick suitable? Must I buy "fire brick", or will anything work
since it's been in a kiln?

Think about it... why would such a thing as firebrick even exist, if "any old
brick" would do?

That sounds good, even like something I would say in response to the
OP, until someone else (you) said it and my usual suspicion and
combativeness took hold. Then I could immediately think of reasons.

It would exist so they could charge more money, so builders could
impress customers.

Or maybe they don't exist and they just make the same bricks, with a
different pattern, and call it firebrick, so they can charge more
money for it.

I'm sure someone can think of more.

To answer your question: No, not all brick is suitable. If it's going to be in
contact with fire, you need firebrick. Unless you don't care if it only lasts
a couple of seasons...