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Originally Posted by demon666
rory read the rest of the info in that link........ it states that it is quite porus....... there must be different types of this rock cause it calles it a different name (the porus stuff)..... but i agree the pic doesnot look porus at all......
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Indeed! I was looking at the picture, and MikeP said his was porous I would be curious to see some pics.
Alternatives to pulling rock out of the oceans are always good, especially calcium carbonate sources.