| Answer | Crossword Clue |
|---|---|
| SANDING | Polishing, in a way. |
| STONING | Polishing in a certain way. |
| colcothar | (Arabic) a reddish brown oxide of iron, used in polishing glass |
| colcothars | COLCOTHAR, (Arabic) a reddish brown oxide of iron, used in polishing glass |
| rouge | red powder consisting essentially of ferric oxide used in polishing glass, metal, or gems and as a pigment |
| pumices | a volcanic glass full of cavities and very low in density that is used especially in powder form for smoothing and polishing |
