NSI Rock Tumbler Classic
It may be a grind to wait nearly 30 days to create polished rock  jewelry with the Rolling Stones Rock Tumbler. But, as the makers  write, "you are grinding in days what it takes nature thousands of years  to do in a stream, river, or ocean." So, find a clean, remote area with a  properly wired outlet where the constant tumbling  won't disturb others (and where curious little hands won't wreak havoc), and start rolling. The first step involves assembling and lubricating the  tumbler itself. Once the two-cup, plastic barrel rolls easily atop its  10-inch-long and 6-inch-high plastic base, it's time to open the small  bag of gritty stones that comes with the kit. Constant maintenance and much patience  will reward the owner with shiny stones in about one month. A small  sampling of jewelry settings and findings is provided, along with order  forms for gold-tinted accessories. --Liane Thomas