So you might be selling or simply want to revitalize your old jewelry to their former glory. Whilst you may be inclined to rather leave it to the ‘professionals’ at the local repair shop to bring out the best in your gems; The truth is they will probably just use a device similar to the following and charge for far more than the effort it took.
How to Use an Ultrasonic Jewelry Cleaner – Jewelry Making
I am here to tell you that there is a far cheaper and simpler method that is just as effective conducted in the comfort of your own home.
All you need to do is add some Handy Andy cream to some warm water. Drop in your dull-looking jewelry for a couple of hours whist lightly brushing them with a soft toothbrush and see how miraculously those little gems regain their sheen.
Perhaps however you wish to be more thorough in which case I suggest you watch this video and pay attention to the specific instructions depending on the type of gem and / or precious metal.