What Is This Red Spot On This Coin?

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Author	Replies: 6 / Views: 1,465
buddy16cat Pillar of the Community United States 1536 Posts	Posted 05/26/2013 06:02 am I soaked this coin in acetone. It was covered in black stuff and the upper left corner had gunk on it. It uncovered this red spot. What is it? Toning? I think it needs another soak. Edited by buddy16cat 05/26/2013 06:04 am Report this Post to the Staff

sel_69l Bedrock of the Community Australia 21788 Posts	Posted 05/26/2013 06:43 am I notice that there is a small green patch next to it. I am guessing at a complex double salt of silver and copper. If it is, then further soaking with acetone wiil not have any further beneficial effect, because what you see is not organic. Nevertheless, some quite interesting INorganic chemistry has been going on. Report this Post to the Staff
ThisIsFun Pillar of the Community United States 2480 Posts	Posted 05/26/2013 07:00 am Looks like cuprous oxide, which can't be soaked off. Report this Post to the Staff
buddy16cat Pillar of the Community United States 1536 Posts	Posted 05/27/2013 3:16 pm Here it was before, I didn't realize that the black stuff would come off, mostly concerned about the gunk covering that red spot. Report this Post to the Staff
ThisIsFun Pillar of the Community United States 2480 Posts	Posted 05/27/2013 3:20 pm You see, that's the value of acetone. You just increased the value by 24 cents! Edited by ThisIsFun 05/27/2013 4:58 pm Report this Post to the Staff
Susuman Pillar of the Community United States 595 Posts	Posted 05/27/2013 8:13 pm Alchemy is true! I will be rich! A soak in Acetone increases the face value by 25x, and changes the metal to something more valuable. I just started soaking a big pile of silver dimes. Tomorrow they will be $2.5 gold pieces. In all seriousness, I unfortunately have to agree that the green and red is probably some level of corrosion and not organic deposits. Report this Post to the Staff
buddy16cat Pillar of the Community United States 1536 Posts	Posted 05/27/2013 8:43 pm I posted the wrong picture. The large cent didn't turn into a Barber quarter. Edited by buddy16cat 05/27/2013 8:51 pm Report this Post to the Staff
	Replies: 6 / Views: 1,465

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