The dark discoloration on our jewelry - which creates our "used look" - is caused by oxidation of the silver. This oxidation can, in rare cases, continue to take place after purchase when silver comes into contact with everyday items that contain sulfur, such as leather, rubber, chlorine, salt water, and even air pollution. We feel that our designs with some character look best with this natural oxidation. But if you want your DANIEL MASON jewelry to look shiny and new again, you can remove these dark spots yourself in no time. To learn how to best care for your silver jewelry, click here.