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Post by Jugglerguy on Aug 29, 2013 21:10:23 GMT -5
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Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,466
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Post by Sabre52 on Aug 29, 2013 21:44:07 GMT -5
Last year I did a few slab pieces that one of our members sent me in a trade. Tumbled them with other jasper, pet wood and agate and they did just fine with no problems at all. Seemed very homogenous in hardness, Maybe just a very slight undercutting in the hematite portions but it all took a mirror polish......Mel
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elementary
fully equipped rock polisher
Member since February 2006
Posts: 1,077
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Post by elementary on Aug 29, 2013 22:38:05 GMT -5
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Post by Jugglerguy on Aug 29, 2013 22:52:19 GMT -5
That's good news, Mel. Maybe it's not as hard to tumble as I thought.
Lowell, I've seen that thread. That stuff is awesome. I sent Steve a message a while ago, but he doesn't seem to come here much anymore.
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Aug 29, 2013 23:56:28 GMT -5
That slurry looks like a nice sauce for some fettucini noodles. Served with steamed fresh vegetables...... That is really nice stuff. If you ever have a 5" cube of it, let me know! ha!
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Post by pghram on Aug 30, 2013 10:17:42 GMT -5
Looking forward to seeing them when they are finished.
Rich
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Post by Jugglerguy on Aug 30, 2013 22:17:53 GMT -5
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panamark
fully equipped rock polisher
Member since September 2012
Posts: 1,343
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Post by panamark on Aug 31, 2013 10:06:16 GMT -5
Anxious to see how they come out Rob. I think I found some of that red and black banded stuff like you showed me. Hope it polishes like yours!
BIF's are interesting in that they are almost without exception very old (precambrian). As I understand it, the earth when first formed had virtually no free oxygen, so iron was very abundant in the water (and air) in an unoxidized state. Then the cyanobacteria finally arrived about 3.5 billion years ago and it is thought they produced all the atmospheric oxygen that was so essential for nearly all life forms as we know it. This oxygen caused the iron to oxidize and precipitate out of the water and air. This produced the BIF's. Various oxygen cycles probably produced the different deposition bands. Virtually no BIF's have been formed since free oxygen became abundant. Okay, time for recess LOL.
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Post by Jugglerguy on Aug 31, 2013 10:40:04 GMT -5
Thanks for the science lesson, Mark! Which red and black banded stuff are you talking about? Like the stuff at the the beginning of this thread, but done with 60/90? Where'd you find it?
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Aug 31, 2013 15:31:07 GMT -5
Anxious to see how they come out Rob. I think I found some of that red and black banded stuff like you showed me. Hope it polishes like yours! BIF's are interesting in that they are almost without exception very old (precambrian). As I understand it, the earth when first formed had virtually no free oxygen, so iron was very abundant in the water (and air) in an unoxidized state. Then the cyanobacteria finally arrived about 3.5 billion years ago and it is thought they produced all the atmospheric oxygen that was so essential for nearly all life forms as we know it. This oxygen caused the iron to oxidize and precipitate out of the water and air. This produced the BIF's. Various oxygen cycles probably produced the different deposition bands. Virtually no BIF's have been formed since free oxygen became abundant. Okay, time for recess LOL. Mark, would that have made the ancient seas also a low pH? Curiosity kills me!
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rolanstones
noticing nice landscape pebbles
Member since August 2013
Posts: 95
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Post by rolanstones on Aug 31, 2013 23:46:59 GMT -5
I really like the color on the Jasperlite, and the banding should look beautiful when you are finished. The more silver colored Banded Iron Formation is also really interesting. I have to ask, why do you think it would not tumble? Is it too soft?
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panamark
fully equipped rock polisher
Member since September 2012
Posts: 1,343
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Post by panamark on Sept 1, 2013 6:23:01 GMT -5
]Mark, would that have made the ancient seas also a low pH? Curiosity kills me! Yes Scott, apparently the oceans were thought to have been a pH of about 5 to 6 as opposed to something like 8 now. As the CO2 is now increasing again, we see our oceans getting slightly more acidic and many of the corals are suffering. Rob, you showed me a bit of some nice yellowish-red with black striped stuff you found on a remote beach on Superior as I recall. You said you need to go back and get more.
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Post by Jugglerguy on Sept 1, 2013 7:13:55 GMT -5
Oh, this stuff. I can't wait to get more. Rolanstones, the more silver BIF leaves silver sparkles on my hands when I handle it, so I think the silver part is too soft. I'm going to give it a try though.
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carloscinco
fully equipped rock polisher
Member since July 2008
Posts: 1,639
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Post by carloscinco on Sept 1, 2013 9:26:11 GMT -5
Looking forward to seeing the results. I've seen some that was tumbled by members on this forum and they looked great.
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Sept 1, 2013 15:22:03 GMT -5
]Mark, would that have made the ancient seas also a low pH? Curiosity kills me! Yes Scott, apparently the oceans were thought to have been a pH of about 5 to 6 as opposed to something like 8 now. As the CO2 is now increasing again, we see our oceans getting slightly more acidic and many of the corals are suffering. Thanks Mark. I appreciate the knowledge. I would have thought it would need to be even lower to have high iron concentrations. RE: CO2 The carbon dioxide component of the atmosphere has fluctuated over the millenia from much higher than to to much lower than now. Yet coral have not gone extinct. I am not too worried.
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panamark
fully equipped rock polisher
Member since September 2012
Posts: 1,343
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Post by panamark on Sept 1, 2013 23:20:30 GMT -5
Oh, this stuff. I can't wait to get more. Rolanstones, the more silver BIF leaves silver sparkles on my hands when I handle it, so I think the silver part is too soft. I'm going to give it a try though. Yup, that is it. I thought it was more red. If I get a picture of my new stuff I will post to compare.
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NorthShore-Rocks
fully equipped rock polisher
Member since December 2008
Posts: 1,004
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Post by NorthShore-Rocks on Sept 14, 2013 10:58:30 GMT -5
Sent you a PM. I hope your batch turned out great!
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Sept 19, 2013 15:26:06 GMT -5
hey Jugglerguy - any updates?? curious friends want to know!
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Post by Jugglerguy on Sept 19, 2013 15:43:43 GMT -5
I did my weekly clean out last night and there are still some pieces that need more time. I should really work some of them on my flat lap, but I didn't have time last night, and it's also going to make a big mess. I've been throwing in some of the banded specular hematite just in cases it will shine up. I will definitely post pictures when they're done!
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