Zam polishing compount is specially formulated for silver and turquoise jewelry, ZAM will not scratch soft stones such as turquoise. Saves time, since you do not have to remove stones before polishing. ZAM leaves a high luster without residue and does not cling to or penetrate the surface of stones. It can also be used as a final finish for gold. Zam comes in a convenient to use peel-back tube.