What blocks Cannot be pushed by pistons?

What blocks Cannot be pushed by pistons? Some blocks cannot be pushed by pistons and the piston head will not extend. These blocks include Obsidian, Bedrock, Furnaces, Chests, etcetera. Pistons will not push blocks into the Void or the top of the map. Pumpkins, Cobwebs, Dragon Egg and Jack-O-Lanterns are turned back into items when pushed.

Some blocks cannot be pushed by pistons and the piston head will not extend. These blocks include Obsidian, Bedrock, Furnaces, Chests, etcetera. Pistons will not push blocks into the Void or the top of the map. Pumpkins, Cobwebs, Dragon Egg and Jack-O-Lanterns are turned back into items when pushed.