xcopperstax, after checking to make sure they are not valuable... I rinse them under running water rubbing them easy with my fingers to get a the dirt off.. then take some baking powder and use a drop of water make a paste. Rub then easy between your fingers with a little of the paste, rinse under water again.. Don't rub them too much, or they will be too, shiny... you want them to look a little aged...