Silver 925, also known as Sterling Silver, contains 92.5% silver and 7.5% copper. Pure silver is not used in jewelry making, as it is too soft. Silver has a seductive look with its warm color-temperature and has been used in jewelry making since ancient times. The disadvantage of silver is: It can react to sulfur in the air (depending on air quality and skin type). This is commonly known as ´tarnishing´ or ´oxidation´. The best way to remove these dark spots is the following: polishing cloth boil water in a pan and add some salt and a piece of uncoated aluminium foil. Then put your piece of jewel into the pan and "pickle" it wait for a while. Effective are also polish products especially made for silver-cleaning.
Enamel is a silicate glass mass made out of quartz sand, potash, natron and chalk. This mass is used as glaze on metals and ceramic surfaces and is fuzed at a very high temperature. Colours, level of transparency and surface gloss can vary depending on the additives used. This is why enamel jewels may be opaque or transparent. It is impossible to see the metal surface on opaque enamels. On transparent enamels, on the other hand, the metal under the enamel glaze is visible.