http://blog.myjewelrydeals.com/search/label/Jewelry%20Care

Now,i tell you some household cleaner:

Consider using common household products for less rare or less valuable pieces. They will usually work, but may cause damage. Try them at your own risk.

1.# Toothpaste: Select a plain white toothpaste (not a gel) without the special whitening options.

* Take a soft, dampened cloth (old t-shirt scraps work just fine) or a damp sponge and put some toothpaste on it. Gently rub over the silver in straight, back-and-forth motions. Alternatively, you can wet the silver piece and gently apply toothpaste directly to the surface which you can then wet again and proceed to polish. In any case, be very gentle, and if you notice scratching at any point, stop and rinse the toothpaste off.
* As the cloth or sponge becomes dark with tarnish, add more toothpaste to a clean part of the dampened cloth/sponge and continue gently polishing.
* Rinse thoroughly with warm (not hot) water and dry with a soft towel.
* Baking soda. Baking soda may remove stubborn tarnish, but don't use it unless you don't mind the risk of damaging the silver. Baking soda is generally considered too abrasive for use on silver.

o Make a paste of baking soda and warm water.
o Gently polish following the directions for toothpaste above.

# Give your silver a bath. Commercial silver "dips" are available which can dissolve stains without rubbing the silver. Contrary to what the word "dip" implies, professionals rarely actually soak silver in these products, at least not for long. Dips are generally harsh, potentially dangerous chemicals (both to the silver and to yourself), so follow the directions carefully and consult a professional when in doubt. You can, however, make a gentle homemade silver bath that gets rid of stains and tarnish by an electrochemical reaction. Be aware that both dipping and electrochemical baths can potentially damage your silver, and they will remove desirable patina, so they're not recommended for silver with an oxidized or French gray finish.

* Heat up an appropriately sized container of water and dissolve a large amount of table salt into the water. Use enough salt such that it takes at least a minute to dissolve in the hot water with constant stirring. Washing Soda (such as Arm and Hammer) works as well.
* Shape a liner for the container from aluminum foil and place the foil in the container of hot water (danger–do not touch the hot water!).
* Place silver that has been previously cleaned with soap into the bath (inside of the foil) for several minutes. Tarnish should dissolve away.
* For stubborn spots, remove and clean with soap and a damp rag before reimmersing in the bath.

**** Warning: This will remove any tarnish, even the antique-y ones. Dispose of salt water down the drain after cooling. This is a simple reaction between the aluminum metal and the silver sulfide (tarnish). The table salt acts as an electrolyte to allow the reaction to happen.
References :

1.Get a plastic bowl
2. Line it with aluminium foil
3. Boil 1½ pint of water, add 1tbs salt and 2 tbs baking soda (this bubbles quite a bit)
4. Pour this into the lined bowl
5. put the silver items in for about 10 min, you can brush them with a soft toothbrush after about 5 min. Let them get in contact with the foil.
6. Rinse off with water and dry with soft cloth

If you have stones in the jewellery let the solution cool down slightly, if pearls don't do it as they are often glued

Your silverware you can put in the bowl and pour the boiling water over. So much faster than spending a day polishing forks…
References :
jeweller

Silver - Put some water in a pan with a few teaspoons of washing powder, bring to a simmer. Throw in alittle piece of aluminum foil, and then dip your silver right into the mix. Pull the item out, dry it off, and shine it clean with a rag.

I found this on the following site:-

http://www.thegoodhuman.com/2007/11/05/the-natural-way-to-clean-everything-in-your-house/
References :