| Author |
 Replies: 11 / Views: 1,365 |
|
|
Valued Member
Canada
215 Posts |
There seems to be an extra blob of gold on this old gold dollar coin. It's defaced the coin so I can't even read the date. Any idea what would cause this...? TIA   |
|
|
|
Valued Member
United States
453 Posts |
Used in jewelry at some point would be my guess.
|
|
Bedrock of the Community
United States
94367 Posts |
Right - Could have been a cuff link or stickpin, for example.
|
|
Bedrock of the Community
United States
10982 Posts |
Yes, it's ex-jewelry and that extra blob might not be gold.
|
|
Bedrock of the Community
United States
94367 Posts |
Definitely not!  |
|
Pillar of the Community
United States
3343 Posts |
Silver test solution might take the solder blob off and reveal the date. It won't hurt the coin any more than it already has been.
"Two minutes ago I would have sold my chances for a tired dime." Fred Astaire
|
|
Pillar of the Community
United States
7618 Posts |
|
|
Pillar of the Community
Russian Federation
5172 Posts |
Quote:
Silver test solution might take the solder blob off and reveal the date. It won't hurt the coin any more than it already has been.  - on the "won't hurt any more" part, at least. Just don't use anything that might harm the gold - which of course still leaves you with a wide variety of options (including some quite strong acids). I think we had a similar case come up on CCF a few years back? |
|
Valued Member
 Canada
215 Posts |
OK I'll look into finding someone who can remove it and post pics again once done. I guess taking it to a jeweller might be an idea, I'm sure they can help...
Thanks for all the info/advice!
|
|
Pillar of the Community
United States
3343 Posts |
Silver test solution sells for about $5 a bottle on ebay. I've used it to deblob gold dollars several times. Sometimes it works, if the blob is silver solder. It hasn't affected the underlying gold coin. "Two minutes ago I would have sold my chances for a tired dime." Fred Astaire
Edited by thq
08/14/2019 09:52 am
|
|
Bedrock of the Community
United States
17884 Posts |
Silver test solution would work if it is silver solder, if it is gold solder I would not expect it to work. For gold solder you would use gold test solution but but the gold test solution will also attack the surface of the coin. But if the karet of the solder is lower than that of the coin it will attack the solder faster. If the solder is a significantly lower Karet you might be able to dilute the solution some so that it doesn't attack the coin but that would probably a little hit and miss.
|
|
Pillar of the Community
United States
3343 Posts |
Here's a typical result on an 1860-S gold dollar.  The test solution removed enough of the solder to see the 0 of the date and confirm that it was an 1860-S. But much of the solder was untouched. "Two minutes ago I would have sold my chances for a tired dime." Fred Astaire
|
| |
Replies: 11 / Views: 1,365 |
|
Posted 08/13/2019 5:41 pm
