Is the one linked to gold or silver?
I agree. Unless you see a powder building up on the surface over time that it easily brushed off, it's not bronze disease, just normal oxidation...
It looks Seleucid--APEI[?]RUTAN? Makes no sense to me, but I don't know Seleucid coins very well. Also, it looks plated rather than solid gold. Is...
Yes, it's pretty automatic, usually doesn't take more than a few minutes.
Wait a minute. I've never heard of a 2x2 flips causing corrosion, even the ones high in PVC (which you want to avoid, but for other reasons)....
BTW, orichalcum is an alloy of copper and zinc. Coins were made of this alloy to distinguish them from the bronze coins (asses) of similar size. A...
Your coin is of Constantine I, a.k.a. Constantine the Great. It was minted in Herclea in A.D. 330-333. The obverse inscription is CONSTANTI - NVS...
Nice coin. Congratulations. It's really thrilling to find a coin like that in a lot of uncleaned coins, isn't it? One time I found two large,...
Arcadius as a little squirt: [ATTACH] AE4 votive from Antioch
You can't hurt it by letting it soak some more. You can also just leave it sitting out for a few months and see if it come back.
No Licinius II yet?
[IMG] Geta Caesar, A.D. 198-209 Augustus, A.D. 209-212 Silver Denarius Rome mint, A.D. 198-200 Obv: L SEPTIMIVS GETA CAES Rev: SPES PVBLICA -...
Many Roman coins can be dated to specific years, other just to the reign of the emperor depicted. There are many, many books out there to help you...
Is there a reliable way to distinguish bronze coins of Phillip III from those of Philip II?
Some dealers might call this tooling, but most of the auction houses that I have dealt with usually call this "smoothing."
Leaving coins in olive oil for too long can damage them. A week is fine. A month is not. Use caution and check them regularly. If you notice the...
Common sense Any coin that has lain around in the ground for 2,000 years is going to come out dirty and discolored. Cleaning is to be expected on...
Well, it's a lot cheaper than a 1909-S V.D.B penny:...
Here's what I would put the coins in: https://www.wizardcoinsupply.com/product/saflips-2x2.html You can buy acid- and sulfur-free card inserts to...
I think the most important consideration is what the coins are actually touching. Both acid-free, archival-grade envelopes and non-PVC flips are...
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