What can a faded page become?

[Vellaen]

All the faded pages are named the same, but they are actually unique items that become a specific page when combined by themselves in the research book. You can tell because only certain faded pages will stack. For example, not all faded Velishoul's Tome pages will stack: the ones that stack with each other will all become either pg. 16 or pg. 108, but in their faded form the ones that will become pg. 16 will not stack with the ones that will become pg. 108 and vice versa.

Unfortunately, there is no way to tell the faded pages apart until you do the combine.