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Identify this rock with parallel lines

+1 vote

asked Dec 28, 2017 by Gopillm (810 points)

1 Answer

0 votes
Maybe chalcedony.

answered Dec 31, 2017 by Weasel (51,230 points)
There are crystal faces on it which would rule out chalcedony. It looks most like quartz. Those lines don't look natural, but if they are, that would be quite unique.