Most of our jewelry is not pure gold, it is 18kt. gold filled. Please remember to take care of your N&K Designs jewelry. To have your jewelry last, please remove your jewelry while showering, exercising, and swimming. Apply perfume, lotion, and hair spray prior to putting on your jewelry to protect it from tarnishing. Gently wipe each piece with a jewelry polishing cloth to make your jewelry shine. Store your jewelry in the bags we provide to have them last longer.