rockbrain
Cave Dweller 
Member since January 2022
Posts: 3,172
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Post by rockbrain on Nov 4, 2023 16:18:32 GMT -5
Copper ore from Minnesota Baltic Mine #1  |
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Post by Pat on Nov 4, 2023 16:24:13 GMT -5
New to me, too. Beautiful! Thanks.
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Post by chris1956 on Nov 4, 2023 16:58:54 GMT -5
Looks nice! What is the non quartz material besides the copper?
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Post by MsAli on Nov 4, 2023 19:49:33 GMT -5
Minnesota or Michigan?
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Post by MsAli on Nov 4, 2023 19:51:44 GMT -5
Looks nice! What is the non quartz material besides the copper? Pretty sure this is the Baltic mine in Michigan and if i remember its bornite and chalcocite |
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Post by chris1956 on Nov 4, 2023 21:28:25 GMT -5
Looks nice! What is the non quartz material besides the copper? Pretty sure this is the Baltic mine in Michigan and if i remember its bornite and chalcocite Ahhh. Now it makes more sense. Thanks |
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rockbrain
Cave Dweller
Member since January 2022
Posts: 3,172
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Post by rockbrain on Nov 4, 2023 23:26:04 GMT -5
Looks nice! What is the non quartz material besides the copper? Pretty sure this is the Baltic mine in Michigan and if i remember its bornite and chalcocite I think you're right. I knew Minnesota didn't sound right as I was writing it.  |
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Post by MsAli on Nov 5, 2023 7:13:04 GMT -5
Pretty sure this is the Baltic mine in Michigan and if i remember its bornite and chalcocite I think you're right. I knew Minnesota didn't sound right as I was writing it.  I wish we had some of this around here  |
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rockbrain
Cave Dweller
Member since January 2022
Posts: 3,172
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Post by rockbrain on Nov 5, 2023 8:48:01 GMT -5
The fact that I purchased it from Upper Michigan Rockhounds should be a clue too!
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Post by rockjunquie on Nov 5, 2023 21:43:00 GMT -5
That stuff sure cabbed up nice!
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rockbrain
Cave Dweller
Member since January 2022
Posts: 3,172
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Post by rockbrain on Nov 6, 2023 1:25:34 GMT -5
Yea, I think it will be interesting wrapped in copper. Not sure what to do about patina. Not too bad to work with other than being a bit grabby on the coarse wheel.
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khara
fully equipped rock polisher
Member since September 2022
Posts: 1,980
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Post by khara on Nov 6, 2023 2:53:25 GMT -5
I was just wondering about patina as well. I’m curious how the copper in the cab itself will age over time. Wonder if the polish process does anything to either slow or speed up potential color change… Really pretty cabs by the way.
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Post by MsAli on Nov 6, 2023 9:23:45 GMT -5
The fact that I purchased it from Upper Michigan Rockhounds should be a clue too! Now that made me laugh |
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rockbrain
Cave Dweller
Member since January 2022
Posts: 3,172
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Post by rockbrain on Nov 6, 2023 18:39:14 GMT -5
I was just wondering about patina as well. I’m curious how the copper in the cab itself will age over time. Wonder if the polish process does anything to either slow or speed up potential color change… Really pretty cabs by the way. Thanks, Khara, I know the slab has been cut for a while and the copper was very bright. I guess time will tell. I also got some "cement mixer" copper from them. They find it with a metal detector, bash the host rock off with a sledge hammer and then tumble it cleaner in a cement mixer. Basically giant natural shape copper nuggets. Some are shaped really nice. I was holding an open box to get some float copper but kept losing the bidding. More stuff that was naturally shaped but it was thin little pieces. I think they would have made nice earrings just putting a hole in them. |
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Post by jasoninsd on Nov 7, 2023 23:18:37 GMT -5
That material is super cool! Thanks for sharing Gary!!  |
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Nov 15, 2024 17:44:51 GMT -5
Nov 15, 2024 17:44:51 GMT -5
