We use these on all our sterling silver jewelry. It’s a little cloth treated with silver polish. It comes in it’s own plastic tube to keep it from drying out. Buff your jewelry with this and it removes the tarnish! buff again with an old washcloth to remove any residue and your jewelry will always look like new and not leave those black marks on your skin and clothes. Store in a zip lock bag or it’s own tube to keep from drying out.Available at our 906 stores for $5. Small things make a difference!!