What is a tool with a hard, smooth, rounded end or surface, as of steel, ivory, or agate, used in smoothing or polishing by rubbing. It has a variety of forms adapted to special uses called?

burnisher — A tool with a hard, smooth, rounded end or surface, as of steel, ivory, or agate, used in smoothing or polishing by rubbing. It has a variety of forms adapted to special uses. (Webster's 1913.)

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