• 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

1,763 questions

3,104 answers

793 comments

7,836 users

What is this rock?

0 votes

This rock is heavy and was found in southwest Washington. The outside as you can see is malachite green and the interior (and I hope you can see it) looks like agate material, dark grey mostly but clear, like smokey quartz. It is quite beautiful. Found a whole seam of this material in an abandoned rock quarry.

asked Sep 4 by trishberrong (250 points)

1 Answer

+1 vote
http://www.minerals.net/mineral/chrysocolla.aspx

Here is a link to chrysocolla. Google it and check the images. You may be able to find one which is similar. Take the sample to a rock shop and they can confirm it. I think malachite and chrysocolla are the best guesses right now.
answered Sep 12 by Weasel (37,800 points)
Thanks Weasel, I did some research and perhaps chrysocolla and chalcedony. Saw several pics that had the green/blue crust with the grayish stone.
 


...