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Post by snowmom on Jun 28, 2015 3:57:15 GMT -5
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Post by 1dave on Jun 28, 2015 7:02:41 GMT -5
Microbes breathed and there was iron.
Nothing came from space, dissolved in water, and precipitated from various chemical reactions?
Curious.
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Post by captbob on Jun 28, 2015 9:23:44 GMT -5
I went through a banded iron phase years back and have a ton of this stuff. That's if hematite & jasper is what you consider "banded iron". SO many different types! Never bothered taking many pictures, but here are a couple.
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Post by mohs on Jun 28, 2015 13:22:15 GMT -5
excellent pictures is there a geo-chemcial connection with haemoglobin?
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Post by 1dave on Jun 28, 2015 13:33:44 GMT -5
excellent pictures is there a geo-chemcial connection with haemoglobin? Interesting that the FIRST life forms had a copper base metabolism. Us iron based forms came later.
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Post by snowmom on Jun 28, 2015 13:37:14 GMT -5
www.pnas.org/content/early/2015/06/23/1505515112 abstract of research paper. Sounds like the microbes lived on one form of iron, digesting it, and passed an iron product on as waste. Theory had it that the red and black were probably an aerobic and anerobic phase of bacterial action and inaction on ferrous material; this might lean toward proving that theory. ? ? ?
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Post by mohs on Jun 28, 2015 15:27:10 GMT -5
I Am Iron Man some inert chemicals when reacting can take on a life of there own sort of
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Post by snowmom on Jun 29, 2015 5:31:13 GMT -5
heh, kinda looks like the pattern you see in ocean jasper, agates, deteriorating basalt, zeolites and some other rocks.. way cool Mr.Mohs
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Post by Jugglerguy on Jun 29, 2015 20:09:05 GMT -5
Bob, I have some from Michigan that looks just like your first picture. Is the color accurate in your second picture? It looks too red. If it is accurate, I love it? Does it have a name?
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snuffy
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Post by snuffy on Jun 29, 2015 21:14:27 GMT -5
A pic of a tumbled piece of South African banded jasper as it was sold as. There was a member on here several years ago that posted pics of a huge amount of banded iron he had come across and I wanted to get a bunch from him,but he never came back on here after that.Can't remember his name. snuffy
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Sabre52
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Post by Sabre52 on Jun 29, 2015 21:57:34 GMT -5
Here's one of my favorite banded iron types, Mugglestone from South Africa ( think it's also sometimes called Sunset Jasper). Silvery hematite with red and yellow jasper colored by iron salts. Pretty to look at and pretty polished but a real saw stopper and messy to work so I hardly ever cut any....Mel
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Post by captbob on Jun 29, 2015 22:12:19 GMT -5
Hey Rob Jugglerguy, I think the color is pretty true in the picture. Flash may have brightened it up a bit. Here is another of the same stuff broken up before tumbling. Gotta say that slabbing it turned the saw oil red red red! Don't know any name. The guy I bought it from 8 or 9 years ago had collected it out west somewhere. Bought a bunch of it which thrilled him because his wife was giving him grief that he was wasting time collecting it. Pretty fractured stuff as he was using a backhoe or something like that to bust it out of the ground. Gotta keep an eye on it (which I didn't!) when tumbling as the hematite is much softer than the jasper and really undercut. I'm a set it and forget it kinda tumbler, and this was my first lesson in undercutting. Doesn't look as bright here maybe due to the matte finish from the grit. I never took the batch bast 60/90 to see how it would polish. Does kind of show just how badly fractured it is. Probably have to tumble 10 pounds of the stuff to get three pounds of quality tumbles. Unless I pulled a G**** and said that I like it when my tumbled rocks look like crap.
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Post by captbob on Jun 29, 2015 22:24:05 GMT -5
I like that Mugglestone Mel, neat looking rock. I'm a huge tiger iron fan, guess that's sort of like banded iron. Got an 75+ pound chunk of it I ought to post a pic of. maybe tomorrow...
Have a couple/few milk crates full of several different types of banded iron, but finding them would be a trick.
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Post by rockpickerforever on Jun 29, 2015 23:17:11 GMT -5
A pic of a tumbled piece of South African banded jasper as it was sold as. There was a member on here several years ago that posted pics of a huge amount of banded iron he had come across and I wanted to get a bunch from him,but he never came back on here after that.Can't remember his name. snuffy Snuffy, this may be what you are remembering - forum.rocktumblinghobby.com/post/429861/thread He called it jaspelite. He was last online in February, but he has a website NorthShore-Rocks
ETA - looks like he sells mostly art prints. But at least you can contact him through the website.
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Post by Drummond Island Rocks on Jun 30, 2015 7:12:20 GMT -5
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Post by captbob on Jun 30, 2015 12:53:38 GMT -5
A type of banded iron if you stretch the definition a bit... Tiger Iron (Australia) 77.4 lbs I need to start buying smaller rocks. That was kinda heavy!
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Deleted
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Post by Deleted on Jun 30, 2015 14:03:19 GMT -5
This is what I pickup here. The pile on the left is attracted to a magnet and the pile on the right is not. Rob @juglerguy sent some really cool pieces but I can not find a photo of it. Sparkles really good if I do not polish it. Jim
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Post by mohs on Jun 30, 2015 16:44:49 GMT -5
excellent pictures above
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Mark K
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Post by Mark K on Jun 30, 2015 17:35:33 GMT -5
Hey Rob Jugglerguy, I think the color is pretty true in the picture. Flash may have brightened it up a bit. Here is another of the same stuff broken up before tumbling. Gotta say that slabbing it turned the saw oil red red red! Don't know any name. The guy I bought it from 8 or 9 years ago had collected it out west somewhere. Bought a bunch of it which thrilled him because his wife was giving him grief that he was wasting time collecting it. Pretty fractured stuff as he was using a backhoe or something like that to bust it out of the ground. Gotta keep an eye on it (which I didn't!) when tumbling as the hematite is much softer than the jasper and really undercut. I'm a set it and forget it kinda tumbler, and this was my first lesson in undercutting. Doesn't look as bright here maybe due to the matte finish from the grit. I never took the batch bast 60/90 to see how it would polish. Does kind of show just how badly fractured it is. Probably have to tumble 10 pounds of the stuff to get three pounds of quality tumbles. Unless I pulled a G**** and said that I like it when my tumbled rocks look like crap. I have never even got it that far without it breaking all to hell. I love that spot, but it is such a pain to get a piece that isn't fractured like that.
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snuffy
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Post by snuffy on Jun 30, 2015 20:48:40 GMT -5
I found the name of the member in my old messages. morsefire,hasn't logged on since 2012.Had found a huge supply,apparently.
snuffy
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