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1,721 questions

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782 comments

7,276 users

Strange rock ?? Sponge like perforation, found near sea very very light in weight, but hard breaks on pressure

0 votes

asked Mar 31 by santoshmlokhande (660 points)

1 Answer

0 votes
Makes me think of pumice. Very cool looking.
answered Apr 4 by Weasel (35,750 points)
May also be slag.
 


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