~How to care for your copper jewelry~
Copper does oxidize (tarnish) quickly, it often has a darker appearance, which can be removed easily with a Copper cloth / Sunshine Cloth / Pro Polish Pad to reveal its beautiful red finish.
I also found lemon juice and a pinch of salt in a bowl and let the copper piece soak for 10 - 15 seconds then rinse with water, then polished with a copper cloth works best.
Store your copper pieces in a ziplock bag to help keep air from it, then store it in your jewelry box or somewhere out of the sun. This will help keep it from tarnishing as fast.

~How to store your sterling silver jewelry~
As exposure to air tarnishes it, storing silver in airtight plastic bags with anti-tarnish strips is a great preventative measure. Just make sure you don’t store multiple jewelry pieces in the same bag: silver is a soft metal, so the individual pieces can scratch each other. Link or chain bracelets should be kept unclasped or unhooked to prevent scratching as well. If you can’t use plastic bags, try to make sure that the storage area has low humidity. You can also place a piece of chalk, a packet of activated charcoal, or a container of silica gel in the storage area to minimize tarnish.

~How to clean your sterling silver jewelry~
*Soap and water: Warm water and a mild, ammonia- and phosphate-free dishwashing soap should be your first line of defense if the polishing cloth fails to remove tarnish. Soap and water should also be used to clean your pieces before using the method listed below.

*Baking soda & water: Make a paste of baking soda and water and use a clean cloth to apply a pea-sized amount to the silver and polish. For etched, stamped or detailed items, thin the paste with more water and use a clean, soft-bristled toothbrush to get the cracks and crevices. Run the silver piece or pieces under running warm water, and dry with a clean cloth.