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Lies, damned lies, and Specific Gravities - my journey to date
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<p>[QUOTE="GDJMSP, post: 3097872, member: 112"]Assuming your testing was performed according to specifications, and I've no reason to say it wasn't, there is no doubt that the coin is not made of the material it was supposed to be made of.</p><p><br /></p><p>But rule out any silver content at all ? I don't think so, with emphasis on the think part. What I'm saying is there could be some silver in it, just no where near what there is supposed to be. There could also be no silver at all in the coin, it could be a modern German silver alloy of some kind making your conclusion absolutely correct.</p><p><br /></p><p>For one thing specific gravity is tricky, from what I know of it a 1% error in any one thing (weight, scales, water used, temperature, air bubbles, etc etc) can cause a 10% error in results. And multiple 1% errors compound that, so 2 1% errors could equal a 20% error in the result.</p><p><br /></p><p>Again, the purpose of my participation in this discussion was and is not to cast doubt on your conclusions, but rather to let others know that there are many things involved, many other possible reasons for a specific gravity test to not return the expected results. And that's kind of important because for a lot of folks if they run an SG test and do not get the expected results the first thing they think is - the coin is a fake !</p><p><br /></p><p>And I was merely trying to point that that's not always the case. With emphasis on not always, the coin very well may be a fake.</p><p><br /></p><p>It's kind of a food for thought thing because if you think a coin you bought is a fake then confrontations can sometimes develop between you and the seller - when the seller is actually innocent of any wrongdoing. And if one can avoid those because you have more information, well then that's a good thing.[/QUOTE]</p><p><br /></p>
[QUOTE="GDJMSP, post: 3097872, member: 112"]Assuming your testing was performed according to specifications, and I've no reason to say it wasn't, there is no doubt that the coin is not made of the material it was supposed to be made of. But rule out any silver content at all ? I don't think so, with emphasis on the think part. What I'm saying is there could be some silver in it, just no where near what there is supposed to be. There could also be no silver at all in the coin, it could be a modern German silver alloy of some kind making your conclusion absolutely correct. For one thing specific gravity is tricky, from what I know of it a 1% error in any one thing (weight, scales, water used, temperature, air bubbles, etc etc) can cause a 10% error in results. And multiple 1% errors compound that, so 2 1% errors could equal a 20% error in the result. Again, the purpose of my participation in this discussion was and is not to cast doubt on your conclusions, but rather to let others know that there are many things involved, many other possible reasons for a specific gravity test to not return the expected results. And that's kind of important because for a lot of folks if they run an SG test and do not get the expected results the first thing they think is - the coin is a fake ! And I was merely trying to point that that's not always the case. With emphasis on not always, the coin very well may be a fake. It's kind of a food for thought thing because if you think a coin you bought is a fake then confrontations can sometimes develop between you and the seller - when the seller is actually innocent of any wrongdoing. And if one can avoid those because you have more information, well then that's a good thing.[/QUOTE]
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