Discussion in 'Ancient Coins' started by CoinZimm, Jul 3, 2020.
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Possibly crystallized or possibly acid-cleaned and with porous surfaces. It's also possible it's bad photography. You'll know when you get it in hand.
Here's my example of that Marcus Aurelius.
Marcus Aurelius, AR denarius, Rome, AD 169. BMCRE 49
Welcome. Do post a follow up telling us what you discovered when you have the coin in hand.
The drachm of Larissa below shows directional patterns from crystals most noticeable under the neck on the obverse. While I don't suggest dropping any ancient coin, I am especially careful with coins that show such signs.
The drachm of Corinth below has classic columns above Pegasus. These are not scratches. The problem is that not all crystallized metal shows on the surface. Some are normal on the surface and a bomb waiting to go off on the inside. That is why I suggest not dropping coins to find out if it was a bad idea. I'm sure there are some who have studied metallurgy that have a grasp on the subject but, at my level, I prefer to avoid shock to very old silver.
Just don't drop it!
@CoinZimm . I agree with those above about handling ancient silver coins.
When I suspect a coin is crystalized, I put it in a Kointains holder. Others will do, but these are inexpensive and the sides are semi visible.
Furthermore, I really like those liberalitas types - they can often be linked to specific donatives for specific events.
I have two of them like yours (I think - RIC 206 - I've been re-checking my attributions from a couple years ago because I made even more mistakes than I do now).
I've kept them both because the one on the left has a die-clash. Not very evident in my poor photos, but the reverse of the one on the left has an outline of the back of Marcus's head and some lettering around the cornucopiae.
P.S. When you post on Coin Talk, if you hit the "full image" button next to your photo, it will appear full size in your post. It took me a while to figure that out.
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