Geckos (apart from the Eublepharians) are unique amongst lizards for their heavily calcified eggs. Producing these shells requires a huge reserve of calcium so many geckos have endolymphatic sacs where they can store excess calcium in preparation for egg development. A female who is on a calcium-rich diet, and not producing eggs will accumulate very large amounts of calcium like you are seeing in yours.

What are you feeding her? How often are you supplementing and with what supplements? Lessening the quantity of calcium in her diet should allow her to use up some of those reserves and bring her chalk sacs back down to a more normal size. Or introduce a male and see if she'll use some of it up for egg production

Zach