Kingsley North Micro-Alumina is a 1 micron aluminum oxide polishing powder which is an ideal choice for use in tumbler and vibrating lap applications. Its non-staining white color makes it easy to use and its cost-effective, efficient, and clean properties make it a popular choice among polishers. Micro-Alumina polish is used in the final stage of rock tumbling and other lapidary work to create an ultra-smooth high-gloss finish with a mirror-like shine on polished stones.