If you are in the Upper Peninsula in Michigan, I HIGHLY recommend visiting the Mineral Museum of the Great Lakes Region (aka the A. E. Seaman Mineral Museum).
They have 4,000 specimens of minerals on display, and 30,000 in the back. And it’s really well done and interesting!
I second this recommendation! The museum alone is worth the trip, but it's also close to copper harbor and lots of rock hounding opportunities. I want to go back for more copper inclusion agates.
It can occur naturally, and I would assume this is a natural one because it was in an excellent museum where they probably would have mentioned if it was altered.
Basically, when it’s found, it’s usually yellow, but as the copper and iron in the mineral react with oxygen and moisture over time, it develops a thin iridescent tarnish.
8 Comments
ickplant@lemmy.world · 19 pts · 61d
If you are in the Upper Peninsula in Michigan, I HIGHLY recommend visiting the Mineral Museum of the Great Lakes Region (aka the A. E. Seaman Mineral Museum).
They have 4,000 specimens of minerals on display, and 30,000 in the back. And it’s really well done and interesting!
GiantChickDicks@lemmy.ml · 2 pts · 60d
I second this recommendation! The museum alone is worth the trip, but it's also close to copper harbor and lots of rock hounding opportunities. I want to go back for more copper inclusion agates.
boring_bohr@feddit.org · 9 pts · 61d
Damn that really is a cool rock
kaklerbitmap@lemmy.world · 7 pts · 61d
So glad I chose Team Rock over Team Stick
LetThereBeNick@lemmy.zip · 3 pts · 61d
Looks like it was hit with a blowtorch. Can this even occur naturally?
ickplant@lemmy.world · 6 pts · 61d
It can occur naturally, and I would assume this is a natural one because it was in an excellent museum where they probably would have mentioned if it was altered.
Basically, when it’s found, it’s usually yellow, but as the copper and iron in the mineral react with oxygen and moisture over time, it develops a thin iridescent tarnish.
Wren@lemmy.today · 3 pts · 60d
A very cool rock.
altphoto@lemmy.today · 2 pts · 54d
That's so chalcopyrite!