• Register


Information for users from the old Q&A site
If you have an account from our old Q&A site, your account was transferred over, but you need to reset your password and confirm your email address.
Reset Password here
Confirm Email here

1,624 questions

2,884 answers

717 comments

5,015 users

I found a rock in lake superior

0 votes

It is a dark grey/ green rock which seems to have irregular tortoise shell like segments with a muddy rust color center in each section

asked Jun 19, 2014 by Weasel (31,630 points)

Help me identify this rock

18 Answers

0 votes

If i could figure out how to add a photo i would

answered Jun 19, 2014 by Weasel (31,630 points)
0 votes

alt textIf i could figure out how to add a photo i would

answered Jun 19, 2014 by Weasel (31,630 points)
0 votes

Could be a fossil of some sort, but the picture is dark.

Do I see a cross on it?

answered Jun 19, 2014 by Renata (7,820 points)
0 votes

Here is another photoalt text

answered Jun 19, 2014 by Weasel (31,630 points)
0 votes

It almost looks like an rock with scribbles on it.

The reddish parts could indicate iron deposits.

I think it is granite.

answered Jun 19, 2014 by Renata (7,820 points)
0 votes

I don't think it is granite but I had already thought about the red being iron. It is the tortoise-shell appearance that gets me which is why I don't think it is granite. The individual facets all have iron in a pattern, they are not streaked through the granite.

answered Jun 19, 2014 by Weasel (31,630 points)
0 votes

The edges around each facet are slightly raised like they are harder than the surrounding rock.

answered Jun 19, 2014 by Weasel (31,630 points)
0 votes

Looks most likely like a petoskey stone: http://en.wikipedia.org/wiki/Petoskey_stone

answered Jun 20, 2014 by hershel (44,400 points)
0 votes

Please look again

answered Jun 21, 2014 by Weasel (31,630 points)
0 votes

Fist sized rock, lattice-like structure, multiple facets, iron shot throughout(at least that is what the red appears to be), the border of the facets seem slightly raised as if that material is harder...because of that it almost has a tortoise-shell appearance. Gray/green rock, black or dark green borders to facets, red middle to each facet.

Rock hunting gathering Lake Muskellonge(sp?) Michigan state park, second week of September2014...I'm going.

answered Jun 23, 2014 by Weasel (31,630 points)
 


...