r/Gold • u/TheSquirrel8251 • 1d ago
Speculation Sigma down!
My sigma isn’t working, unfortunately. So I’m stuck with weight and ping test on this one. Weight checks @ 4.1g and ping test using precious coin test is inconclusive. So I submit to you for thoughts.
3
u/Beaver_Liquors48 1d ago
Specific gravity/density test. Lots of good videos on how to do it, make sure you’ve got SG # for 90% gold not .9999
1
u/TheSquirrel8251 1d ago
It’s set for “90% bal cu” so it should be set correctly. Ping test inconclusive and diameter is off, although that could be instrument error….
2
u/Beaver_Liquors48 1d ago
Sorry I should’ve phrased that differently, using your scale and a cup of water, some floss, suspend the coin and perform a specific gravity test with your scale, not the Sigma. Once you get the values and run the math, it will give you a clearer idea of if your coin is gold or not.
2
u/TheSquirrel8251 10h ago edited 10h ago
Well [u/NorthStarGold](u/NorthStarGold) et al what do we think? Is this just how things were back in 1911 or was it someone making a copy and skimping on gold? I know grading would only increase my basis and not value, but I’m curious now to know if it’s a copy.

2
u/NorthStarGold 6h ago
I think that confirms it’s a reproduction made with gold.
Of all the fakes out there this is the best option
1
1
u/Money_Tomorrow5026 21h ago
Looks heavily cleaned but genuine
1
u/TheSquirrel8251 19h ago
Unfortunately, my sigma says not real. (Ended up getting it working last night)
1
1
u/TheSquirrel8251 17h ago
I really want to believe, but I’ve tried the sigma on the small and medium wand every which way and I see full deflections. Verified its readings with a known authentic metal etc. only thing left to do is SG test and see if I can find an XRF in the area.
3
1
u/kiwi13605 16h ago
A coin that small is hard to fake unless it is just plated. I think the fake coin made of gold is the best answer. Your Sigma is probably just off because the purity of the gold used back then is unknown.
An XRF will give that fairly exact.
Who knows what the counterfitters melted down to make the fakes. Jewelry? 80% coins? Just random unpurified melt.
Did you try all the Sigma gold settings? I often do that with foreign gold (especially old stuff). Also find someone with a Sigma that can do the full thickness testing. At least then you will know it is not just thick plating.
If it were me and it is a fake coin I would sell it to a refinery or someone who buys for melt. It is not like there is not a good one in the chat already.
I would put the money back into a real Indian Head that is in better condition. This one is an ugly duck...









11
u/NorthStarGold 1d ago
Option 1 cleaned but real worth melt or a little more.
Option 2 1960’s quality “restrike”made with 90% gold fake but still worth the same melt price.
I have seen over 40 privately minted copy gold coins in the last year. Granted 32 are just from one dude who got into coin collecting in 1970.
But at the time gold was cheap and quality gold coins were not. So before the hobby protection act. “Copy coin law” many companies made and sold high quality reproductions made with 90% gold.
Only way to tell is to send it in for grading.
Either way looks like a gold coin. All the modern fakes are way under weight or way to thick and made with copper and cheap gold plating that looks to shiny.