I agree with another reviewer that you need to read the instructions. I recommend watching a Youtube video on the Gemoro Ultraspa before reading the instructions. Once you see how it works, it is simple to use and the instructions make more sense. You need to know to avoid: emeralds, opals, pearls and jade to name a few of the softer gem stones listed. Glued stones are to be avoided. The instructions go over that. But any cleaning method for diamonds would be inappropriate for these more delicate gems. The results are impressive. I could not be happier. The gold sparkles as do the gem stones. Gold chains look new. The results match my favorite jeweler. The machine is light weight but sturdy, holds quite a number of pieces in the ultrasonic tank. I covered the bottom of the basket with jewelry and they all cleaned nicely. I was pleased how quickly I could clean all my jewelry. It is roughly 10" wide by 10" deep and 11" high.