Sanding sugar I would assume. Most glitters are not edible (they are labelled non-toxic, ie ou can eat it but won't digest it).
It looks like Hot Purple Disco Dust to me...
It looks like purple sanding sugar that was photographed in just the right light to make it extra sparkly. I don't recommend covering cake pops in disco dust.
Sanding sugar for sure. I have used it many times in all different colors on cake pops.
Thank you all so much. Is the sugar so crunchy that it makes the cake pop difficult to eat?