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  1. #1
    us
    Aug 2009
    116
    4 times

    melting a silver coin at home

    Has anybody here ever tried processing a silver coin to separate to copper and silver? How did you do it? I just came across a Kennedy and the face of the coin is completely destroyed. I doubt that I could weight it because of all the damage. So that leaves only one option if i want to find out if it was a 64 or a 40%. I want to weigh the silver and copper separately. Plus I think it could be kind of an interesting experiment.

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  3. #2
    us
    Aug 2009
    White's MXT
    2,068
    5 times

    Re: melting a silver coin at home

    I personally wouldn't do it. I would leave it to the pros. Metals have different melting points.. so copper and silver will have different melting points and so they would start to separate from eachother at those points. The temperatures are very high so that you can't do it on your stove top. You'd have to have specialized equipment. It's not worth the trouble.

  4. #3
    us
    Dec 2010
    bounty hunter 1100
    596
    3 times

    Re: melting a silver coin at home

    Not to mention what the wife is going to say when you destroy her cooking pot

  5. #4
    us
    Feb 2011
    Minnesota
    Garrett GTI 1500, Garrett AT Pro
    86

    Re: melting a silver coin at home

    The major problem I see with this idea is that it will cost you more to melt it then what it is worth. I think you would be better off just selling it as a 40%er if you cant make out a date or unsure if it's a 90% or 40%. Good Luck And Happy Hunting!!!

  6. #5
    us
    Aug 2009
    White's MXT
    2,068
    5 times

    Re: melting a silver coin at home

    Quote Originally Posted by Demon_Wolf
    The major problem I see with this idea is that it will cost you more to melt it then what it is worth. I think you would be better off just selling it as a 40%er if you cant make out a date or unsure if it's a 90% or 40%. Good Luck And Happy Hunting!!!
    How can you be unsure of whether it's 90% or 40%er? It's very obvious. Plus you can weigh to be sure.

  7. #6
    us
    Aug 2010
    Maryland
    Fisher CZ70
    62
    1 times

    Re: melting a silver coin at home

    If weighing isn't an option because too much material is gone, then find someone with access to a chemical or materials laboratory and have him measure the density. The density for a 90% silver coin is a constant because it is an alloy. The density for a 40% silver coin with surface damage will vary because it is clad, but the loss of the purer 80% silver outer surfaces will make its density decrease from an undamaged 40% silver coin. And an undamaged 40% silver coin is less dense than a 90% silver coin, so the damage will make it even easier to measure a difference in density.

  8. #7
    us
    Dec 2010
    143
    2 times

    Re: melting a silver coin at home

    there are several way to do this chemically,like out prospecting. They all involve some nasty chemicals tho. The big issue is,how do you,or a buyer,know the purity? If you follow the directions,you should have .999 pure silver,but how would you prove it to sell it? Imagine you found a 1 oz gold nugget.Its not pure gold! Most gold in nature is 14-18k,so worth less as gold,but more as a novelty due to the size and rarity.

  9. #8
    us
    Aug 2009
    116
    4 times

    Re: melting a silver coin at home

    I don't really intend to sell the metals i extract from the coin. this is an idea that is more for the experience and fun then profit.

    I read on line that I can use nitric acid has anybody tried that before?

  10. #9
    us
    Dec 2010
    143
    2 times

    Re: melting a silver coin at home

    I've seen the nitric acid,but never tried it. I imagine if you were making jewelery or such,it might be fun to try.

  11. #10
    us
    Oct 2010
    1

    Re: melting a silver coin at home

    Hello. I am an analytical chemist. An easy, non-destructive way to determine alloy is to find somebody ( or a lab) that has an XRF unit. In about 3 minutes, they can determine the alloy content of the coin.

  12. #11
    us
    da book worm--researcher

    Feb 2007
    callahan,fl
    delta 4000 / ace 250 - used BH and many others too
    14,251
    624 times
    Honorable Mentions (1)

    Re: melting a silver coin at home

    a 40 will have the copper core "brown streak" --a 90 will not --date 64 is 90 - 65 to 70 -40

  13. #12
    us
    Jan 2010
    124
    8 times

    Re: melting a silver coin at home

    Just do the sound test. Take a stack of 40%'ers and a stack of 90%'ers. Put your unidentified coin in the middle of each stack, shuffle them in your hands and listen. 40% and 90% do sound slightly different, so this should identify it.

  14. #13
    us
    Jan 2010
    1,699
    44 times

    Re: melting a silver coin at home

    Don't burn your house down trying.
    rileyboy

  15. #14
    us
    May 2011
    703
    18 times

    Re: melting a silver coin at home

    Concerning the Nitric Acid, I remember some prominent person said something about "not inhaling".

    Good advice if you ask me.

    Keep on Rollin' !

  16. #15
    us
    Apr 2011
    Northeast
    388
    1 times
    All Types Of Treasure Hunting

    Re: melting a silver coin at home

    Off the topic.. I thought about trying to make a ring out of a Walker.. I saw some videos online and they came out really nice. I am sure I would totally screw it up though.
    "By failing to prepare, you are preparing to fail."



    March '12 Finds: 186 40%, 24 90% (36.19 troy oz)

  17. #16
    us
    Jul 2010
    New Hampshire USA
    Bounty Hunter Platinum
    1,118
    25 times
    Metal Detecting

    Re: melting a silver coin at home


  18. #17
    us
    Nov 2010
    743
    113 times

    Re: melting a silver coin at home

    Going through all that for an extra $8.50? I guess if the thrill of possibly burning down your house is worth the $8.50, go get the blow torch and hazardous chemicals. Please be sure to scan and post the article of the house fire that will most likely blanket your local papers. I can not wait to see the Fire Marshall's quote as to the "possible cause" of how the fire started.

    MU

  19. #18

    Feb 2007
    7

    Re: melting a silver coin at home

    Why are you guys so against an adult using fire and chemicals? I know of someone who has refined metals at home, however the toxic chemicals are what likely led to his cats dyeing.

    Be sure to do this in a well ventilated room.
    Coin totals for 2007
    Halves : searched $1060
    40% : 17
    90% : 0

  20. #19

    May 2006
    CO, AZ
    dfx, Ryedale!
    1,642
    133 times

    Re: melting a silver coin at home

    Quote Originally Posted by skelly9131
    Just do the sound test. Take a stack of 40%'ers and a stack of 90%'ers. Put your unidentified coin in the middle of each stack, shuffle them in your hands and listen. 40% and 90% do sound slightly different, so this should identify it.
    Agreed. If you drop one coin at a time in a stack of 90 and then 40 and have this coin in each stack, you will hear it sound "odd" compared to the others in one stack, and not the other. It will give you the answer.

    Also, someone else stated if you look at the side of the ocin, somewhere on the side there WILL BE a brown streak if it is 40%. It might be big or maybe small, but somewhere there should be one. This test is not as reliable, as some 40%ers have a streak that is close to impossible to see. But if you see it, then it can not be a 90%, and that is conclusive.

    Use both tests. You'll have an answer, and not destroy the coin (More than it already is). :-)

  21. #20
    us
    May 2011
    703
    18 times

    Re: melting a silver coin at home

    Did you know that if you throw a steak into a blaze of pure liquid Oxygen that the ?-thousand degree temp sears the steak to perfection?

    Just sayin.

    Dealing with business loonies is wild enough for me.

    Have Fun !

    Keep on Rollin'

 

 
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