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2,211 questions

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76,817 users

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

0 votes

asked Mar 31, 2017 by santoshmlokhande (850 points)

1 Answer

0 votes
Makes me think of pumice. Very cool looking.
answered Apr 4, 2017 by Weasel (58,160 points)
May also be slag.