How to Clean Copper Jewelry
To keep your copper jewelry sparkling clean, use a solution made from some warm water, 2 or 3 drops of lemon juice and 1 teaspoon of table salt. Mix it up really well. Add the pieces of jewelry to it and let them stay for about 5 minutes. Take the jewelry out and rinse it off. If there are still tarnished places, try a little ketchup and an old toothbrush.