Crystallised Pineapple

Crystalized Pineapple is a candy sold at honeydukes. It may be a large crystal-like candy pineapple. It may also be small pieces of crystal-candy pineapple. It is a favourite of horace slughorn. Tom riddle may have bought this candy to sway him to give him information on creating horcruxes. This is not known but he did get the information that night.