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Can you use 1 inch thick marble in a cob oven

 
Vince Panero
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posted 12 years ago
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...cuz I heard that certain rocks explode. --but marble is metamorphic, which is stable.i have 2 pieces of marble I'd love to incorporate into my coming cob oven. I also plan to use fire bricks. Thoughts?
 
Daniel Morse
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Save the marble for someting beautiful and functional. Use firebrick. Its cheep and it is what it is made for.

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R Scott
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I am using soapstone--got some scraps from the Habitat Re-Store for a song, cheaper than firebrick.

I think marble will crack along the grain lines. But if it is bedded well, it will be a stable crack in the floor but still usable.

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tel jetson
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I'm with Daniel: use the marble for a prep counter next to the oven.

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Daniel Morse
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I did some asking. marble can be a soft stone of sorts. not a great fire brick.

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John Polk
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...cuz I heard that certain rocks explode.



I don't know about granite, but I have always heard not to use river/creek rocks for fireplaces. Through the years, river rocks can absorb a fair quantity of water. If they are then placed next to a heat source, that trapped water can quickly expand, often enough to explode.
 
Satamax Antone
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Hey guys, as for refractory rocks, if this can be of any interest, quartzite is refractory. http://en.wikipedia.org/wiki/Quartzite

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