"The Ruby Heart" is an Oz short story written by Michael O. Riley. It was published in Oz-story Magazine No. 5 in 1999. At the start of the story, Bungle the Glass Cat has tripped over an emerald in Ozma's palace and broken herself in two pieces. Ozma is absent, visiting Queen Zixi in Ix; Dorothy, the Scarecrow, and the Tin Woodman decide to carry Bungle to Glinda for repairs. On their way to her palace, they stumble into a remote corner of the Quadling Country that is occupied by strange beings made of bricks.