Help with details Please [решено]

I have an ancient coin I inherited from my father in law, the information he was given was “greek 700-350 BCE”, he passed over 10 years ago. The coin weighs 8.09 grams and is 20mm wide and 3mm thick. The images are looking to be of {OBS - Dionysus} {REV - basket with grains and possible cow or deer, also is written AMIEO} My research is concluding that it is between 85-65 BCE during the Mithradates Eupator's rule. My problem is I can not find it in gold or gold plated. If this coin was 10 karat it would weigh 10.9 grams, I am not sure what purity of gold was being used back then.

Thank you any help would be very appreciated 

Chris

Welcome to Numista. You piqued my curiosity so I have been working on this one for a while now and will continue to try to get to the bottom of this. I am so far essentially coming to the same conclusions as you did but some things on the reverse are similar but do not match exactly so I am not ready to come to a definitive conclusion. In the meantime dare I ask, if a genuine coin of the era, is there any possibility that this example was gold plated years ago but long after it was made? You mentioned plating and I have good reasons for that suspicion as well. It is also not entirely out of the question to be a replica coin at this juncture.

How would I go about determining if it is plated? I only mentioned that because I saw it as an option during my searching. Or if it is a replica?

ChrisHeliker

How would I go about determining if it is plated? I only mentioned that because I saw it as an option during my searching. Or if it is a replica?

A local reputable  jeweler could determine if it was plated  by several methods including weighing the coin and doing the math, rubbing the coin on a special stone and testing for the purity of the residual substance left on that stone with special chemicals for  10K 12K,18K,  etc if it is gold at all. A little detective work in the beginning saves a lot of research later. So far, nothing here makes sense as I can find nothing made of gold by this mint of that era. Similar in base metals but no exact match. Doesn't add up.

Ok, thank you. I will try and have this done next week and will share the results.

ΑΜΙΣΟΥ, Pontos Amisos, no gold for this coin

https://www.acsearch.info/search.html?term=Dionysos+amisos+&category=1-2&lot=&date_from=&date_to=&thesaurus=1&images=1&en=1&de=1&fr=1&it=1&es=1&ot=1&currency=usd&order=0

Could is be someone else instead of Dionysus? While the face has similar features, I don't see the wreath or what could be cluster of grapes. 

ChrisHeliker

Could is be someone else instead of Dionysus? While the face has similar features, I don't see the wreath or what could be cluster of grapes. 

This is where the problem lies. It could resemble anything or anybody but we are all coming to the same conclusions as to similar coins based on the information provided and what is presented but never an exact match and all base metal coins of similar design.  Thus the real possibility of a replica with gold plating. We will never find an exact match if it is not genuine. Back to basics and composition as previously discussed by a respected local jeweler.

harryg

Back to basics and composition as previously discussed by a respected local jeweler.

Yes, guessing does no good.

But…based on the diameter and thickness and weight, assuming it's round, then the approximate density is 8.6g/cc.  If so, then the gold content is zero (not counting negligible weight from very thin plating).  8.6g/cc points to copper or high copper content alloy (brass, bronze, etc.).  Silver (billon) is possible but only if the silver content is less than 10%.

rsirian1

harryg

Back to basics and composition as previously discussed by a respected local jeweler.

Yes, guessing does no good.

 

But…based on the diameter and thickness and weight, assuming it's round, then the approximate density is 8.6g/cc.  If so, then the gold content is zero (not counting negligible weight from very thin plating).  8.6g/cc points to copper or high copper content alloy (brass, bronze, etc.).  Silver (billon) is possible but only if the silver content is less than 10%.

You do not have to explain to me how the density, diameter, thickness and composition determination works. These basics are what the OP does not understand or has yet to accept. This is  exactly what he found and others are finding. a bronze / brass coin over and over again. He sees a gold coin. The OP needs convincing so I recommended the Jeweler, in person, so he can see with his own eyes the “ gold content”, purity, or lack thereof, and weight discrepancy of it were it in fact a genuine gold coin of even minimal purity. All he sees is a gold coin, a sentimental one at that,  that he is trying to reconcile and validate. Allow him to eliminate the gold content issue first. Somewhere else.

No gold! In brass and fake

gold, copper, and zinc are all present in the coin, so it is most likely a gold plated brass coin

Anshar

ΑΜΙΣΟΥ, Pontos Amisos, no gold for this coin

 

https://www.acsearch.info/search.html?term=Dionysos+amisos+&category=1-2&lot=&date_from=&date_to=&thesaurus=1&images=1&en=1&de=1&fr=1&it=1&es=1&ot=1¤cy=usd&order=0

No sorry. It is not one of those. It is a replica of something similar to one of those. It is a fantasy piece plain and simple.

read my last message.…