rottenstone

[ rot-n-stohn ]

noun

1. a friable stone resulting from the decomposition of a siliceous limestone, used as a powder for polishing metals.

rottenstone

/ ˈrɒtənˌstəʊn /

noun

1. a much-weathered limestone, rich in silica: used in powdered form for polishing metal

Word History and Origins

Origin of rottenstone¹

First recorded in 1670–80; rotten + stone

Example Sentences

The unpainted surfaces will be kept clean and bright with rottenstone and oil or "Putz-pomade."

From Project Gutenberg

Polishing is effected by wooden wheels fed with wet pumice-powder and rottenstone and by brushes fed with moistened putty-powder.

From Project Gutenberg

Tripoli (and rottenstone) are used in polishing powders and scouring soaps as well as for filter blocks and many other purposes.

From Project Gutenberg