This machine is good for cleaning jewelry, glasses, watches, hygiene items, stationary, silver items with dirt accumulation, and other items like coins, keychains, kitchen utensils, and more! They recommend not using it to clean glasses and sunglasses with pre-existing scratches and cracks in the coating, tarnished silver items, and jewelry containing loose stones or soft/porous stones (ex: pearls, emeralds, amber, and opal). The machine has a three minute cleaning cycle and an auto shut-off feature!
Promising review: "I ordered this product based on the great reviews and I was not disappointed. My ring center stone is a white sapphire and gets dirty extremely quickly. I've tried different cleaners and even taking it to mall jewelers, but they could never get it as clean as the jeweler we bought it from, (that's over an hour and a half away). Because of this, my ring would get so dirty to the point of not even wanting to show it off. This little guy, with some Blitz Gem and Jewelry Cleaner, made a HUGE difference. I ran it a handful of times because of how dirty it was and can't believe how shiny it is now. Very pleased with this purchase!" —Amazon Customer
Get it from Amazon for $34.99.