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Post by greig on Oct 20, 2021 17:02:52 GMT -5
I was given a 30lb rock that a friend picked up at a copper mine in Northern Ontario (Canada) for me. I was quite surprised by the insides. The whole rock is like this. The gold colour is pyrite and the host appears to be dolomite. The black is hematite.  |
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fishnpinball
Cave Dweller 
So much to learn, so little time
Member since March 2017
Posts: 1,491 
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Post by fishnpinball on Oct 20, 2021 17:07:17 GMT -5
I hope that will take a polish
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Post by rockjunquie on Oct 20, 2021 17:11:24 GMT -5
Wow! That's nice! Should make some gorgeous cabs if it takes a polish.
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Post by mohs on Oct 20, 2021 17:17:02 GMT -5
poly 2 MOHS + CuO + H2O → M2Cu(OH)4 morphed !
thanks for posting Greig ~
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Post by Son Of Beach on Oct 20, 2021 18:07:16 GMT -5
I see Kansas and North Dakota, maybe Nebraska. That stuff is wild!
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Post by jasoninsd on Oct 20, 2021 20:22:12 GMT -5
Dang Greig, that is so freaking sweet!  What're your plans for that beauty? Cabbing it...polish the slabs? |
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Post by fernwood on Oct 21, 2021 1:53:07 GMT -5
A beautiful example of copper ore with a lot going on.
Lucky you.
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Post by greig on Oct 21, 2021 8:29:19 GMT -5
Dang Greig, that is so freaking sweet! What're your plans for that beauty? Cabbing it...polish the slabs? The original slices are gifts for some fellow rockhounds that I will be meeting up with this weekend. I will hold a couple back for me to play with. probably try to polish one and cut out cubs in the other. I have more of this rock to cut but need a larger saw. If I like the result, I will do a trip next spring to get more. The site is an 8 hour drive for me. |
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Post by hummingbirdstones on Oct 21, 2021 9:22:59 GMT -5
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Post by knave on Oct 21, 2021 9:43:34 GMT -5
Dang Greig, that is so freaking sweet! What're your plans for that beauty? Cabbing it...polish the slabs? The original slices are gifts for some fellow rockhounds that I will be meeting up with this weekend. I will hold a couple back for me to play with. probably try to polish one and cut out cubs in the other. I have more of this rock to cut but need a larger saw. If I like the result, I will do a trip next spring to get more. The site is an 8 hour drive for me. Of course Greig would give it away. What a great guy! |
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Post by Rockindad on Oct 21, 2021 18:40:32 GMT -5
That is so nice I don't even think it matters if it takes a polish or not.
Question: say you did grind this down and achieve a polish, would you coat this to retard any patina onset? I've handled a lot of copper sheet metal, sometimes patina is desired, sometimes not. Wouldn't think you would want it in a cab.
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Post by hummingbirdstones on Oct 21, 2021 20:28:08 GMT -5
That is so nice I don't even think it matters if it takes a polish or not. Question: say you did grind this down and achieve a polish, would you coat this to retard any patina onset? I've handled a lot of copper sheet metal, sometimes patina is desired, sometimes not. Wouldn't think you would want it in a cab. I don't see any native copper in there, but usually polished cabs of copper complex don't patina all that fast. If they do, a quick rub with a jeweler's polishing cloth takes care of it. |
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Post by jasoninsd on Oct 21, 2021 21:04:42 GMT -5
Dang Greig, that is so freaking sweet! What're your plans for that beauty? Cabbing it...polish the slabs? The original slices are gifts for some fellow rockhounds that I will be meeting up with this weekend. I will hold a couple back for me to play with. probably try to polish one and cut out cubs in the other. I have more of this rock to cut but need a larger saw. If I like the result, I will do a trip next spring to get more. The site is an 8 hour drive for me. Since there's no definitive "pattern" or grain to this, couldn't you split the bigger pieces into sizes your current saw could handle? (Not trying to coax you into doing it or anything... LOL) |
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Post by greig on Oct 22, 2021 5:17:43 GMT -5
That is so nice I don't even think it matters if it takes a polish or not. Question: say you did grind this down and achieve a polish, would you coat this to retard any patina onset? I've handled a lot of copper sheet metal, sometimes patina is desired, sometimes not. Wouldn't think you would want it in a cab. I'd try not to add anything. |
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