Jewelry is vulnerable while it's being worn, but it can also suffer damage if it isn't stored properly. Diamond is the hardest substance on Earth. So how does a diamond get scratched? By another diamond. Diamond jewelry can also scratch softer stones as well as gold and even platinum. For this reason, it's important to store your jewelry so the pieces don't come in contact with each other.
Wrap individual pieces in tissue or cloth, or put them in separate compartments in a jewelry box. Be extra careful with pearl jewelry, since it is soft and scratches more easily than gems and metals.
Often jewelry comes in a special box, bag or wrap. Keep these; they are often the best means for storing or packaging the jewelry and will provide protection from damage and dirt.