If you look around, you can find perfluoromethyldecalin for $30 per liquid ounce in small quantities. Not much is needed to do specific gravity,...
Actually, you can use any liquid which is noncorrosive and has a density of less than the coin to do specific gravity. Don't use drain cleaner or...
Just had a chance to explore the new NGC registry. For browsing sets and looking at images, it's an improvement. The large fonts are...
The atmosphere surrounding the coins is more important than temperature (within limits). Best atmosphere is none at all (vacuum) or an inert gas...
If you are thinking of taking a metal detector to a foreign country, research their rules thoroughly. That includes any countries that you may...
Regarding the title of the thread and some of the discussion, widespread selling of fake coins on eBay won't kill the hobby. It might kill the...
O-pun your coin album.
I just received an email from Stack's Bowers that "Meet the Expert" with David Hall will be held at their booth at major coins shows during 2019....
I too greatly prefer digital copies. Take up less space (essentially none), are instantly available, have great portability, and can easily be...
A coin with a known and widely recognized provenance (e.g. GSA, SS Central America, Saddle Ridge, Newman, Eliasberg, etc.) will almost always be...
PVC residue must have been on coins before they went into Ziploc bags. Genuine Ziplocs are made of polyethylene, not PVC. Polyethylene is as...
I believe it's a gaming token. You can find a listing of these in that style in TAMS Journal, Aug 1974, part II. TAMS is Token and Medal...
You can get a set on Amazon for $159 (without the electric heating mantle and ring stands). See link and pic below. Cal Link:...
Is the 2014 Kennedy coin considered a bullion coin or commemorative coin? Cal
I'd set the distillation flask to soak in soapy water. So I had a look, and there is still quite a bit of crud that was removed from coins by...
The coins I usually treat with Dissolve aren't normally very dirty. So, it's hard to see a difference between the used and regenerated solvent....
Dissolve (aka Freon-113, aka CFC-113, aka 1,1,2-trichloro-1,2,2-trifluoroethane) was for many years a popular coin cleaner; it was primarily a...
It's beside the main point of your post, but what country produces 3/4 oz gold bullion coins? Just curious because I'm not that familiar with...
I've checked through past auction sales. Interestingly, PCGS uses both PR65CAM and PR65RD CAM on labels. And, they use PR65CA in Coin Facts and...
Shouldn't the grade be stated as PR65CA? Cal
Separate names with a comma.
