To help bring out the shine on a piece of silver jewellery, you can go the expensive chemical route, or you can reach inside your fridge, pull out some eggs, and literally get cracking.
Photo by The ChainMaille Lady.
The egg yolk oxidisation method won't work on pure silver jewellery, so don't go testing this method out on your mom's fine silver necklace. Most run-of-the-mill silver jewellery, however, is of .925 purity or lower, so you should be safe there. That said, first start out by boiling one egg, then place the contents (minus the whites) and the jewelry inside a bag. Make sure to use paper towels to help keep the yolks separate from the jewelry. Lastly, seal the bag and let the contents sit for a day (longer if you prefer more darker coloured jewelry).
After you've left it to soak in the secret sauce, pull the jewelry out and gently buff the surface of the piece. Sulfur from the eggs will have tarnished (in a good way) the deeper crevices of the jewelry, while your own buffing should have successfully removed the oxidation from the higher points.
Word to the wise: whatever you do, make sure to open the bag outside, not inside your home, unless you're one to enjoy the lingering smell of old eggs. If you need to go the opposite route and get your jewellery sparkling and tarnish free, check out our previous post on how to make your own jewellery cleaner.
How to Oxidize Silver with Egg Yolks [wikiHow]