Gem & Jewelry Cleaner Blitz Gem & Jewelry Cleaner is ideal for cleaning gold jewelry, platinum jewelry, diamond jewelry, as well as ruby, sapphire, topaz, amethyst, aquamarine, garnet, peridot and other non-porous precious and semi-precious gem and precious jewelry. This is one of the leading jewelry cleaners on the market. Each 8 Oz jar comes with a basket to retrieve your jewelry from the solution as well as a small brush to help remove any larger particles.