Nugget input -- Wisconsin Find
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  1. #1

    Oct 2006
    14

    Nugget input -- Wisconsin Find

    A while back in suburban Milwaukee Wisconsin I found a strange "nugget" of what looked like some kind of slag from soomething. It came out of the ground mostly green, with bits of rifle-shell-casing-colored metal here and there.

    I thought it was some kind of welding slag or something, but when I cleaned it up it looks natural, like a mix of gold and copper. It meters out on the detector square in the nickel range, just like a gold ring. The material when gently scraped shows the gold colored inner metal, and it will not react with lab-grade sulphuric acid. Ruling out the presence of much copper. It is also very mallable. A university geology professor at first thought it was calcopyrite, but the mallebility factor ruled that out. He surmised it may be low-carat gold, but he had never heard of another gold find in Wisconsin. After years in my "treasure chest," the gold has not tarnished, and the green-patina copper colored part has stayed stable too.

    It is about 3 inches long, 1/2 inch wide, and looks very much the shape of a natural copper nugget, only more rugged, with less-rounded/eroded edges...It weighs about an ounce or so..

    Is this possibly some low-grade gold nugget that was brought along with the same glaciers that deposited all the copper nuggets in Wisconsin? I will post a photo as soon as possible.

  2. #2

    Oct 2006
    14

    Re: Nugget input -- Wisconsin Find

    Maybe this will help with an ID. I scraped the bare spot about 10 years ago, and you can see how mallable it is where it's been hammered by the geologist on one end. His verdict was it doesn't quite fit gold but it doesn't match up with anything but gold. He said copper would have definitely reacted with the acid he tested it with. Anyway, given that it pegs right at nickel on the detector, and it doesn;t appear to be man made, I'm keeping my hope up it's an unusual find.

    What do you think? Is it natural? Is it native to Southeastern Wisconsin? Was it carried to Brookfield by man or glacier? Or is it just some kind of industrial junk.

    Thanks for any help...
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  3. #3

    Jun 2006
    34
    2 times

    Re: Nugget input -- Wisconsin Find

    I'm no expert (hardly even a novice) but that looks like gold to me. Some body should be able to test it. I'm rooting for ya!
    Pete

  4. #4
    us
    Nov 2004
    Edwards,Missouri
    MXT - DeLeon - Gamma 6000
    5,599
    56 times

    Re: Nugget input -- Wisconsin Find

    What does it weigh?

  5. #5

    Feb 2006
    10

    Re: Nugget input -- Wisconsin Find

    Looks like a piece of bronze to me. Take it to a jewelry shop. They should be able to test it electronically with a gold kt checker.

  6. #6

    Oct 2006
    14

    Re: Nugget input -- Wisconsin Find

    Good idea on the jewlery shop. it weighs about 2 ounces on a postal scale. I hope it is not bronze. However, bronze would have a copper content of 40 percent to 90 percent, depending on the grade, and should have reacted to strong sulphuric acid, I think. Any chemists out ther? I'm suspecting that bronze would peg much higher than nickel on the detector. Also, the gold-colored bits were gold-colored when I pulled it out of the ground. I'll haul it to a jewerly shop and try that approach...Hope doesn't make it a nugget...

  7. #7

    Apr 2006
    Ventura, CA
    LST
    801
    10 times

    Re: Nugget input -- Wisconsin Find

    check for specific gravity.

  8. #8

    Oct 2006
    14

    Re: Nugget input -- Wisconsin Find

    how?

  9. #9

    Apr 2006
    Ventura, CA
    LST
    801
    10 times

    Re: Nugget input -- Wisconsin Find

    I was afraid you would ask that. Basicly you do it by weighing the specman in water. Try these web sites for info.

    http://www.ganoksin.com/borisat/nenam/gravity.htm

    http://www.gold-nuggets.org/specific-gravity-test.htm

  10. #10
    us
    Dec 2005
    Eugene, Oregon
    Fisher CZ5, White's GM VSat
    4,095
    126 times

    Re: Nugget input -- Wisconsin Find

    This looks more like something that has been in a fire, gold nuggets do not stay all stretched out like that without being rolled up into ball. The edges suggest wear, and if were worn by water action, it would be rolled up of split apart long before the edges rounded. Most likely a fire. As to the metal, the specific gravity test would be a good place to start.

  11. #11

    Oct 2006
    14

    Re: Nugget input -- Wisconsin Find

    This object was found in dirt, nowhere near water. It was in a lawn of a former house site.

    It clearly doesn't match up with any sort of standard-issue nugget. I'm getting very distracted by the fact that it measures dead-on nickel on my CZ6.

    I'll get it to a jeweler.

  12. #12

    Oct 2005
    Washington State
    DFX
    724
    16 times

    Re: Nugget input -- Wisconsin Find

    Looks like a piece of melted brazing rod to me. Me, and a friend of mine use to melt brazing rod & let it drip into a bucket of water, looked like gold nuggets. Then we would dump the bucket off the bridge at a popular tourist gold panning spot at night, and then sit up on the bridge in the morning , drinking our morning coffee, and watching people go nuts. I know, cruel joke.......one of those things you do as a teenager, and look back as an adult & wonder what the heck you were thinking.

    Paul
    Friendship is like peeing your pants....... everyone can see it, but only you
    can feel the true warmth.

  13. #13
    us
    May 2005
    Northern California
    8,312
    2990 times
    All Types Of Treasure Hunting

    Re: Nugget input -- Wisconsin Find

    Looks very similar to byproduct of the electroplating process used in the manufacture of circuit boards. It builds up in chunks like that on the plating bars. Common mixture used is ni/au (nickle/gold)
    Banking off a Northeast wind, sailin' on a summer breeze

  14. #14
    us
    Jul 2004
    Angels Camp,Ca.
    779
    750 times

    Re: Nugget input -- Wisconsin Find

    Throw it in nitric acid in a well ventilated area with no wind blowing and see what's left after the smoke clears....Dave

  15. #15
    midwest_prospector

    Re: Nugget input -- Wisconsin Find

    Dave is right, Nitric Acid should tell you for sure. I have found a lot of native copper and some of it has had a similar shape to that, but I have never seen any with a burnt black coating. The copper that I have found is always caoted with a green or rarely purple patina. I have found copper nuggets while dredging that actially do look like gold on the outer surface, but it is only skin deep. It also doesn't seem heavy enough to be gold for its size, I would think it is probably brass or bronze, but the nitric will tell you for sure. I have some pictures of a few of my "native copper" finds on the photo pages of my website, they might give you a better idea of what copper should look like. http://www.midwestprospector.com/page2.html

    Chuck Lassiter

 

 
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