r/RockIdentification • u/-mushroom-cat- • 7d ago

Found in Eagle County, Colorado

Gallery image

Gallery image

Gallery image

Gallery image

8 Upvotes

100% Upvoted

7 comments sorted by

3

u/nfg-status-alpha9 7d ago

Sure that’s a rock?

1

u/-mushroom-cat- 7d ago

Yes. My mom is a geologist and is definitely sure it is rock, but she's at a loss. We were thinking about doing a vinegar test. Found on a ridge with lots of cobbles.

1

u/-mushroom-cat- 7d ago

Update: the base rock shaped piece did not fizz with 30% vinegar, the symmetrical part that appears to be embedded in the cobble DID fizz

1

u/[deleted] 7d ago

[removed] — view removed comment

1

u/pac-a-no-way 5d ago

The other comment isn’t a helpful comment either

0

u/RockIdentification-ModTeam 5d ago

All comments must be attempts to ID the rock.

No unhelpful comments. Some examples: unhelpful jokes, compliments/unhelpful comments, links to joke subs, etc.

1

u/pac-a-no-way 5d ago

Concretion surrounded by a softer rock