It is used in certain crafting recipes and can also be linked in a Transport Hub with Glowstone instead of Redstone, this process requires 8000 RF and is immediate.
At this point it becomes a Linked Resonant Pearl, a specialized version of the Linked Pearl which can be linked to locations that do not contain a hub. By shift right clicking with the pearl in hand a Linked Resonant Pearl binds itself to the location where the player is standing. If used the pearl will then teleport the player to this new location, consuming the pearl. Linked Resonant Pearls do not currently function in Access Points but they can be placed in Linkable Blocks allowing for the creation of interesting new traps or travel systems.