For the Collectibles as a mentor

Is it 300 Separate unspoiled nodes to collect or 300 separate collectibles items you harvest from it for the Mentorship program?

Thanks!

300 total items (same as the crafting collectable items requirement)

Edit: You can also track your progress by looking at the status of the following achievements (as the requirements are actually complete these achievements):

100 Crafting Collectables - I Made That (Worth Collecting) I
300 Gathering Collectables - I Collected That I