So, it turns out Quartzie has a unique little thing about her!

Her stomach is somehow highly reactive to anything that is sugary or sweet: If Quartzie were to eat anything like that, she'd get really fat really quickly! With each sugary/sweet food item she eats, her belly grows 1 inch fatter! Once she starts eating, she won't stop! If you were to give her a crate full of candy, she'd devour the whole thing and be left with a huge belly! After a few minutes of being all fat and chubby, she'll start shrinking down to normal, getting half an inch (1.27cm) thinner per second, so there's no need for her to go on a diet or exercise.

So yeah, Quartzie is freaking addicted to candy, and will grow super fat if you let her near any candy... ^^;
My advice: Keep your candy away from her! X3