Minecraft wiki entry for Development_versions, associated text: Chorus flower
Chorus plant
Ender chest
End gateway
End portal
End stone brick
End rod
Dragon egg
Dragon head
Purpur block, pillar, slab and stairs
Stained Glass and Stained Glass Panes
Stained Glass blocks use the regular glass texture due to issues with the rendering engine.
They cannot be crafted in Survival and are not in the Creative inventory.
Structure block
Only accessible with mods. Cannot be obtained with the /give command, or with inventory editing.
Structure void
Only accessible with mods. Cannot be obtained with the /give command, or with inventory editing.