Ender Pearls, when thrown and immediately given back, become invisible in the inventory. Upon clicking on the slot where the ender pearl was in the inventory, the invisible ender pearl appears with the mouse.

Steps to Reproduce:
1. Place a command block down with the following command:

/scoreboard objectives add enderpearlsthrow stat.useItem.minecraft.ender_pearl Ender Pearls Thrown

2. Place a command block chain with the following commands.

In a repeating command block:

/testfor @a[score_enderpearlsthrow_min=1]

In 3 conditional chain command blocks, connected by the repeating command block:

/scoreboard objectives remove enderpearlsthrow

/give @p minecraft:ender_pearl

/scoreboard objectives add enderpearlsthrow stat.useItem.minecraft.ender_pearl Ender Pearls Thrown

3. Activate the repeating command block.

4. Give yourself one ender pearl. (in the first slot in your hotbar)

5. Throw the ender pearl in survival/adventure mode.

6. In your inventory, hover over the slot where the ender pearl was.

7. In your inventory, click on the slot where the ender pearl was.

8. An ender pearl should appear.