I recently bought the contents of a print shop that closed almost 50 years ago. Included in the purchase where boxes of very old ink and solutions. In with the dried out bottles were 2 metal cans of interest. One is labeled as gold powder and the other is bronze powder. The bronze powder is lighter and sparkles which leads me to believe it is iron pyrite or actually bronze dust. But the gold powder is in a can 2.5 inches in diameter, 1.5 inches tall and weighs 9 ounces - labeled as a 1/2 pound can. Obviously very old - Company of manufacture is the Charles Eneu Johnson and Company (Philadelphia) which is out of business probably 75 years ago. The powder does not sparkle but shines like gold when hit with light. I was wondering if anyone has run into anything like this before? I have tried a standard gold test kit with the HNO3/HCl solutions. Does not dissolve at 10K but does somewhat at the higher karats. I don’t have access to HNO3 by itself. I understand that the 10K gold test solution is only dilute HNO3 and the others at higher karats are weak aqua regia and could give a false test. Any help with this would be appreciated. Happy New Year!