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Using stone in the presence of fire

Stone Conversations : Archive 9 : Message 00300

From: Tomas Lipps <tmlipps@zzzzzzzzzzzzz>
Date: Fri, 20 May 2005 20:53:43 -0600
Subject: Using stone in the presence of fire

interesting.

I once used (for 5 or 6 years) a limestone basin as a hearth. it was
4 to 5 inches thick. built hundreds of fires on it, kept some of
them going for days. no problem. also heated lumps of basalt, until
they were glowing red, for heating sweat lodges. even poured water
on them. no harm done there either. perhaps other igneous rock
would work as well. after all it's experienced greater heat than than
it will in a fireplace. I believe I've seen fireplaces built of
sandstone which would gradually deteriorate, but not explode or throw
hot spalls. anyone have technical knowledge about which stone can
and can't be used?

tomas

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