In Roald Dahl's "Charlie and the Chocolate Factory", what fruit does Violet Beauregarde turn into?

"Charlie and the Chocolate Factory" is a 1964 children's novel by British author Roald Dahl. The story features the adventures of young Charlie Bucket inside the chocolate factory of eccentric chocolatier Willy Wonka.

Violet Beauregarde is one of the four main antagonists of "Charlie and the Chocolate Factory". She is the vain, self-centered, snobby, and gum-obsessed child.

When Wonka shows the group around the Inventing Room, he stops to display a new type of gum he is working on. The gum doubles as a three-course meal which is composed of tomato soup, roast beef and baked potato, and blueberry pie and ice cream. Violet is intrigued and, despite Wonka's protests, snatches and chews the gum. She is delighted by its effects but, when she reaches the dessert, blueberry pie, her skin starts turning a somewhat blue color and her body begins to swell up, filling with juice. Eventually, Violet's head, legs, and arms get sucked into her gigantic body, but she is still mobile and is able to waddle. When her swelling stops, she resembles a round blueberry, causing Wonka to have the Oompa-Loompas roll her to the Juicing Room to have the juice squeezed out of her in fear she may explode. She is last seen leaving the factory with the other children, restored to her normal size but with indigo skin like of a blueberry. Wonka says there is nothing that can be done to change Violet's skin back to its original pigment.