• 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

1,799 questions

3,145 answers

800 comments

8,430 users

Anyone know what this is?

0 votes

I don't know where this was found. I used the h acid test and it immediately bubbled. Does not scratch glass. Leaves a coppery colored streak. Can be scratched with fingernail but does not flake. It is not transparent.

roughly 1 1/4 longest point. 1" wide at center. 3/8th D.

 

 

asked Nov 6, 2015 by Dizzard (790 points)

1 Answer

+1 vote
Little slice of Jasper. Google it. It is one of the most beautiful rocks. Don't get wrong it could be something else but I think Jasper.
answered Nov 6, 2015 by Weasel (38,360 points)
I went through all the jasper images and just copper images before I posted- I didn't see anything close- or I may have missed it- I will check again. Yes, it is a beauty! Thanks for your help!
It certainly has the look of Jasper, but if it effervesces in acid, that would indicate it as being a carbonate - i.e. such as banded calcite/aragonite like travertine. Though the brick-red color is definitely odd for that - perhaps its deeply iron-stained.
H:

I think you are right. I looked up Banded Calcite and there was a photo that showed a close up, no edges. The banding and color were very similar. II believe it is Banded Iron! Another mystery solved!

Thank you very much,
D

Related questions

0 votes
2 answers
asked Jan 27, 2016 by Stoner (120 points)
0 votes
1 answer
0 votes
3 answers
asked Apr 4, 2013 by Penguin453 (200 points)
 


...