Copper

"The sun shone brightly on a stack of cauldrons outside the nearest shop. 'Cauldrons — All Sizes — Copper, Brass, Pewter, Silver — Self-Stirring — Collapsible', said a sign hanging over them."

- Description of Potage's Cauldron Shop.

Copper (chemical element Cu) is a chemical element; a soft and malleable metal with a reddish-orange tarnish and very high thermal and electrical conductivity.

Rubeus Hagrid owned a kettle made of copper,   which he normally stowed in the pockets of his coat, as well as a large copper basin which he used as a contaner into which Ronald Weasley could burp slugs after being hit with his own backfiring Slug-Vomiting Charm. Potage's Cauldron Shop sold Copper Cauldrons for a price of twenty-five Galleons. The taps of the sinks at the second-floor girls' lavatory at Hogwarts that concealed the entrance to the Chamber of Secrets, were made of copper. Professor Trelawney also owned a large copper kettle, which she kept warming in the fireplace of the Divination Classroom, giving off a "heavy, sickly sort of perfume". Molly Weasley owned a large copper saucepan, and there were copper pots and pans at 12 Grimmauld Place; Kreacher hit Mundungus Fletcher over the head with a copper saucepan in 1997. The quills on display at Scrivenshaft's Quill Shop, in Hogsmeade, were all in copper pots. The boat at the lake in the Horcrux cave was teathered to land by an invisible, coppery green chain. Copper lamps prove warm light at Hufflepuff Basement, and copper bed warmers hang on the walls of the dormitories.

Appearances

 * Harry Potter and the Philosopher's Stone
 * Harry Potter and the Chamber of Secrets
 * Harry Potter and the Prisoner of Azkaban
 * Harry Potter and the Goblet of Fire
 * Harry Potter and the Order of the Phoenix
 * Harry Potter and the Half-Blood Prince
 * Harry Potter and the Deathly Hallows
 * Pottermore