To continue cleaning or not?

I'd be curious to see the result.

PS. I wouldn't use Jax brown or the like. The coin will patinise naturally over time and that'll look better.

 

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True, but won’t it take like 20 years to recover from a fully pink state?

 

I think the pink will turn to very light brown within less than several months (depending on the environment; it may even turn somewhat brownish/greenish if the air is humid enough). But of course, it'll take many years to gain that real dark patina.
I'd just bury it in the soil if I wanted to speed up the process (a complete amateur speaking here). The challenge will be to not forget about it and/or remember the spot. I've lost quite a few things like that when I was a kid.

 

That’s a great idea! I was thinking about leaving it on a windowsill or something. Some nice soul outside will turn it nice in no time.
I will have to try that

 

Wow - that's the original 'rainbow tone' coin

 

I agree, a toothbrush would be best.

Soaking the coin in extra virgin olive oil should help to remove more of the build up on the coin. Place the coin in a small glass jar, pour enough olive oil to cover the coin, let it soak for several days. You will start to see particles of the foreign matter in the bottom of the jar. Take the coin out of the oil, and rinse with hot, soapy water Put some Dawn dish soap on the toothbrush, and gently go over the surfaces of the coin with it, to remove matter softened up by the olive oil. More than likely, the coin will need to go back into the olive oil at least several times. If the oil used for the initial soak has gotten dark, or has a lot of particles in it, replace it with fresh olive oil, and repeat .This procedure is somewhat slow, but is much gentler than lemon juice, etc.
This way of cleaning can remove foreign material without stripping the coin to bright metal.

 

The coin appears to be silver. Mechanical cleaning would probably be the best bet, but labor intensive. Lemon juice alone might loosen some of the corrosion. Wouldn't use vinegar.

 

Above the pictures it says AGRIPPA As 11,5 gram, so it cant be a denarius.

Coin will look like this once its cleaned by his friend and repatinated:

 

Vinegar tends to be a good option when you find blue deposits. I don’t know why but it works.

color guide for bronze coins:
Brown, black, green = lye
Blue = vinegar
Orange/rust = sodium thiosulfate

 

I just seen that movie yesterday...a classic.

 

I'd say keep it, as is. Display it on your coin working area as a reminder of what not to do. Worked for me. JMO

 

..silver?!?...i got some wire you need to invest in......

 

Honest mistake I think, the coin fabric is very shiny and under certain lighting conditions silver could probably look pinkish

 

i'm teasing him...

 

...and made me cry...

 

Putting the sodium in the water is the fun part...