• 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

1,923 questions

3,334 answers


10,344 users

chalcopyrite with rainbow colors

0 votes

How does chalcopyrite get rainbow colors, in my mining career I've found quite a few raw copper rocks that are crystalized in rainbow colors

asked Oct 8, 2014 by Malpais1 (120 points)

1 Answer

0 votes

The colors are caused by iridescence, which is similar to tarnishing when the chalcopyrite is exposed to weathering or acid.

answered Oct 13, 2014 by hershel (47,760 points)