jewelers' rouge

noun

colcothar.

Words nearby jewelers' rouge

jewel box, jewel case, jeweler, jeweler's saw frame, jewelers' putty, jewelers' rouge, jewelfish, jeweller, jeweller's rouge, jewellery, jewelry

Definition for jewelers' rouge (2 of 2)

colcothar
[ kol-kuh-ther ]
/ ˈkɒl kə θər /

noun Chemistry.

the brownish-red oxide of iron produced by heating ferrous sulfate: used chiefly as a pigment in paints and theatrical rouge, and as a polishing agent.
Also called jewelers' rouge.

Origin of colcothar

1595–1605; < Medieval Latin < Old Spanish colcotar, Spanish Arabic qulquṭār, perhaps < Greek chálkanthos copper sulfate solution

British Dictionary definitions for jewelers' rouge

colcothar
/ (ˈkɒlkəˌθɑː) /

noun

a finely powdered form of ferric oxide produced by heating ferric sulphate and used as a pigment and as jewellers' rouge Also called: crocus

Word Origin for colcothar

C17: from French colcotar, from Spanish colcótar, from Arabic dialect qulqutār