The fastest is if you can post photos but since you mentioned that it's mounted on a jewellery, it's usually worth about bullion value. However if it is a keydate, your chances might be better but don't count on it.
My partial coin collection http://www.omnicoin.com/collection/gxseries
My numismatics articles and collection: http://www.gxseries.com/numis/numis_index.htm
Regularly updated at least once a month.
My numismatics articles and collection: http://www.gxseries.com/numis/numis_index.htm
Regularly updated at least once a month.




















