This is a sub-page of Minecraft (Bedrock).
Nether Reactor Core
This block reserves ID 247.
Before the implementation of the actual Nether, this was the main block required to access a large nether-like tower (made out of netherrack). In order to activate it, you had to place certain blocks at certain areas.
When correctly activated, the time will immediately be set to night, the tower will be made, and Zombie Pigmen as well as other various items will spawn inside it.
It will also say the following in the player chat: Client message: Activate!
The following items are spawned inside the tower:
- Glowstone Dust
- Cactus
- Pumpkin Seeds
- Wheat Seeds
- Melon Seeds
- Sugar Cane
- Nether Quartz
- Red Mushroom
- Brown Mushroom
- Bowl
If the player attempts to use this block without using the proper block pattern, it will say the following in the player chat: Client message: Not the correct pattern!
For some reason, after the base functionality of the block was removed from the game, the textures for the block were updated to use the texture for the Plastic Texture Pack. When mined in survival with a pickaxe, this block drops 6 iron ingots and 3 diamonds. Silk touch doesn't have any sort of effect on this block.
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Glowing Obsidian
This block reserves ID 246.
Before the implementation of the actual nether, this was the block used after the Nether Reactor Core was correctly activated. The certain blocks placed at certain areas would become this block, and then when the tower started to decay, it became regular obsidian.
info_update/info_update2 Block
The info_update block reserves ID 248. The info_update2 block reserves ID 249.
A placeholder block added in Pocket Edition Alpha 0.1.3, which uses a modified dirt texture with "update!" written on it in a grass texture. There is also a similar placeholder block that appears to say "ate!upd" which has, since Alpha 0.8.0, been corrected to say "update!". They previously generated in place of blocks with invalid IDs.
reserved6 Block
This block reserves ID 255.
A placeholder block added in Pocket Edition Alpha 0.2.0, originally, it possessed the same texture as stone, until in alpha 0.15.0 build 1, texture now uses the texture as info_update block.
Unknown block
This block reserves ID 560.
A placeholder block exclusive to Pocket Edition add in alpha 0.11.0 build 1 that generates in place where blocks have an invalid ID or invalid components in their behavior files. If the block has a unique model, it takes the shape of that model. It was added to represent blocks with invalid IDs, replacing the functionality formerly used by info_update.
Unknown Element
This block called tile.element.unknown.name reserves ID 36. This block when placed down places a dirt block with a question mark placed on it, which is the default texture used on Bedrock Edition when there is no texture for a block or item. This block can be moved by pistons. The weird name is explained by the fact that this block doesn't have a translation key, which is how this game gives blocks names. This block can only be accessed in Education Edition.

Stone Slab
There is a weird version of the Stone Slab in-game. This version of the block is visually the same as two smooth stone slab's stacked on-top of each other. In-game the Smooth Stone Block is used instead of this one. This block takes in the item and block ID 43, has the name Stone Slab and is in the item category Construction.
