A genuine article that has been altered or added to for the purpose of enhancing its market value, such as:a finger ring that at a later date has been enamelled in black to make it appear to be a rare piece of memorial jewelry or mourning jewelrya piece of jewelry to which some additional gemstones have been added latera piece of jewelry to which an inscription or maker's mark has been addeda gold or silver article bearing a hallmark, where the mark has been altered or a new one soldered on in order to indicate an earlier datea diamond that has been subjected to irradiation to change its colours. 6. a zircon made colourless by heat treatment to simulate a diamond