• 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

2,138 questions

3,737 answers


16,328 users

What is this?!?!

0 votes

I got this from an auction when a natural museum closed down. It was in a lot box that I had bid on and won. Any information would be helpful. This picture does not do it justice. The brown in this image is actually more of a red. I was told it's some sort of crystallized coral. Someone also said it could be river opal. I have no idea. Please help. Thanks.

asked Mar 5, 2017 by Talltalltimbers (120 points)

1 Answer

0 votes
Looks like a concretion, or a geode which ground water has seeped into and crystalized. The crystal could be quartz, chalcedony, agate...
answered Apr 4, 2017 by Weasel (55,310 points)