Should I Ruin This Coin To Test It. - Page 2

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Author	Replies: 21 / Views: 3,748	Page: of 2

daniels Pillar of the Community United States 1620 Posts	Posted 06/04/2012 9:09 pm There is a hand held machine that tests for gold silver etc its all digital and you just touch the machine on what your testing Report this Post to the Staff
Conder101 Bedrock of the Community United States 17884 Posts	Posted 06/05/2012 09:33 am Specific gravity test? It won't damage the piece and could tell you a lot. Report this Post to the Staff
SteveCaruso Pillar of the Community United States 1796 Posts	Posted 06/05/2012 09:58 am Quote: That's a full sized axe not a hatchet That'll do! Report this Post to the Staff
january1may Pillar of the Community Russian Federation 5176 Posts	Posted 06/05/2012 5:00 pm Quote: @january1may - You can do a diamagnetic test with a larger magnet, but there needs to be some means to slide things around. Diamagnetism is a phenomena where a material exhibits a direct opposite magnetic force if -- and only if -- it's in motion relative to a strong magnetic field. A spherical magnet could work if it's pull is closer to 500 g to 1 kg, which is easy to manage if it's neodymium. If it's a button (1 cm diameter) you can put the coin in a flip and simply slide the magnet down the outside of the flip. If it's a large magnet, you'll have to slide the coin on the magnet somehow which is harder but doable (with some jiggery-pokery). OK, what I have is a bunch of neodymium spherical magnets straight out of Neocube - around 5 mm diameter each and with just under 500 g of pull. Probably not enough (In fact, just tested this with an 1923-S Peace dollar for which I have no reason to doubt the authenticity and an 1841 large cent which even if somehow not authentic certainly isn't silver. The results were similar enough that I couldn't tell the difference... guess I'm stuck looking for a better magnet ) Report this Post to the Staff
donkrx Valued Member United States 227 Posts	Posted 06/07/2012 12:59 am Ahhhh I cringed when I saw the pic of you holding it with your thumb and finger on the faces! Definitely, definitely do not scratch it or cut it in half. Find out first please! I'm sure you can find a way to do the diamagnetic test. Report this Post to the Staff
stev18 Valued Member United States 329 Posts	Posted 06/07/2012 7:16 pm could you measure it's volume in ml compared to it's toal weight to find out it's density? Density of silver is 10.49 g/ml Report this Post to the Staff
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