Giant piece of silver? trade silver?

[Steeltowndigger]

I found this in a farm field along with a 1700's coin. some kind of work on it.. i also ran a neodymium magnet down it and it went real slow like it would on a piece of silver. is this some kind of native trade silver?

 

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[HuntinDog]

Well it was found on farm land, so I'm thinking it could be the left over from a Babbitt bearing pour.
Sorry I don't know the

specific gravity of Babbitt, but I'm sure it could change with the different mixes of material.​

 

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[desertexplorer]

Never even thought of bearing material which is a mix of antimony, lead and a small amount of copper, and the specific gravity would be about right for 9.3...

 

[Noah_D]

Silver isn't magnetic at all. Might be nickel silver alloy ("german silver").

The moving magnet induces an electric current in the metal which creates a magnetic field opposing the magnet, slowing it down. I have seen it work for Aluminum and Copper as well... EDIT: I am not saying I think your metal is Copper (duh) or Aluminum, I am just saying that this property is seen in other materials as well as silver.

 

[Charlie P. (NY)]

The moving magnet induces an electric current in the metal which creates a magnetic field opposing the magnet, slowing it down. I have seen it work for Aluminum and Copper as well... EDIT: I am not saying I think your metal is Copper (duh) or Aluminum, I am just saying that this property is seen in other materials as well as silver.

Bollux. I am unconvinced. What you are describing is the Hall Effect but I don't see where it would slow a magnet's slide. If you turn the sample 180 degrees or swap poles of the magnet does it speed up the magnet's slide? I doubt it. Friction would have more effect than magnetic attraction to non-magnetic material.

 

[desertexplorer]

It’s actually Lenz Law and seems to only work on material that is paramagnetic or diamagnetic. It’s demonstrated here using copper but will also work well with aluminum and silver as well as a few other metals:

 

[Noah_D]

Bollux. I am unconvinced. What you are describing is the Hall Effect but I don't see where it would slow a magnet's slide. If you turn the sample 180 degrees or swap poles of the magnet does it speed up the magnet's slide? I doubt it. Friction would have more effect than magnetic attraction to non-magnetic material.

I was talking about Lenz's Law (https://www.britannica.com/science/Lenzs-law)... It's NOT magnetic attraction btw and it doesn't matter which way you turn the magnet. Look up "Eddy Current Demonstration" on youtube.

 

[Noah_D]

It’s actually Lenz Law and seems to only work on material that is paramagnetic or diamagnetic. It’s demonstrated here using copper but will also work well with aluminum and silver as well as a few other metals:

Agh! You beat me to it by like four minutes!

 

[Bigcypresshunter]

You can purchase a Silver test solution. I used to make my own from Nitric Acid, Distilled water and Potassium Dichromate.

 

[desertexplorer]

Darn, I knew I should of waited another 4 minutes!

 

[desertexplorer]

Here’s another cool video showing the same effect but this time on a silver bar vs a counterfeit lead bar:

 

[GoldieLocks]

My boyfriend said the water suspension is to find out displacement. It is more complex and you may want to look up the steps online to go it right and divide the correct numbers.

 

[desertexplorer]

It is more then just water displacement, that’s why the item is suspended in water then weighed. This gives you the displacement weight of the object. Specific gravity is the ratio of the weight of water to the weight of the object. In this case a ratio of 1:9.3 with water being 1.

 

[Noah_D]

Specific gravity is just the density, which is just calculated by dividing the weight of an object by it's volume. To weigh it you just use a scale and to find the volume you just see how much water it displaces.

I'm sure what desertexplorer said could work but this is what the books taught me and is the easiest method imo.

 

[xaos]

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