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Rock identification

0 votes

Hi! About a year ago i found this weird rock. It's non magnetic and the holes in it goes straight through.

Ideas?

asked Oct 7 by rockinsweden (120 points)

2 Answers

0 votes
Your rock looks like it has a host rock. In other words the inner rock looks to have formed inside an outer rock formation. You have porous rock into which a mineral solution leaks. It solidifies into a crystal or a simple silica like chalcedony... Does the exposed inner rock have a waxy feel. Real smooth?
answered Oct 9 by Weasel (54,570 points)
0 votes
It certainly has the appearance of flint or chert. Can you please post some pictures?
answered 1 day ago by hershel (51,300 points)
 


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