• 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

2,234 questions

3,904 answers


104,409 users

Can you tell me please the name of this beautiful stone ?

0 votes

Hello there, I just found near the Baltic sea this beautiful shimmering mineral stone. This stone is black ( dark grey) metallic color with rainbow (blue, purple, green, pink, gold) shimmer. Can anyone tell me please what stone it is ?

asked May 9, 2016 by Vaida Escobar (120 points)
edited May 10, 2016 by Vaida Escobar

4 Answers

–1 vote
It looks somehow like bismuth or maybe tellurium but I am not sure , test the rock's hardness and post it , so we will see what it is.
answered May 11, 2016 by Tagiadin John
Tagiadin John - Your answer very unlikely as the Baltic Sea area does not have polymetallic deposits where these uncommon elements would occur in a native state. The pictures aren't great and the posted did not provide much supportive info, but the description of "black dark grey) metallic color with rainbow (blue, purple, green, pink, gold) shimmer" indicate chalcopyrite with iridescence (or perhaps a similar copper sulfide.)
0 votes
It seems like volcanic glass. Even though there is no obvious volcanic activity in the area, volcanic minerals are commonly found in the baltic sea, possibly relocated by glacial processes.
answered Dec 7, 2016 by anonymous
Im no expert but ill give it a go, it looks alot like bornite. That or you've been trolled with some sort of rock coated in titanium oxide.
+1 vote
It is peacock anthracite or peacock coal.
answered Jan 10, 2017 by Ember
I don't think that's likely. It was my first thought, but I live in the anthracite area of PA and Peacock coal is usually much smoother than this, and the colors aren't so pronounced and have more of a rainbow affect.
0 votes
That looks like a piece of ammolite! They're very colorful, it is made of the fossilized shells of ammonites.
answered Jul 22, 2018 by Victoria B.