Minecraft:Conductivity

Conductivity is a Minecraft:block property that determines whether redstone signals can be conducted through them (i.e. Minecraft:powered). When conductive blocks receive a redstone signal, they are able to activate redstone mechanism components, and may be able to power adjacent redstone dust. Conductive and non-conductive blocks also have properties not related to redstone; for example, mob spawning, and suffocation.

Conductive blocks are often called opaque blocks because many common blocks that can be powered are Minecraft:opaque; for example, Minecraft:stone, Minecraft:dirt, Minecraft:wood. Non-conductive blocks are often called transparent blocks because the most common example is Minecraft:glass. However, whether or not you can see through the block does not determine whether a block can be powered. Most opaque blocks share a similar set of properties, and most transparent blocks share their own set.

Properties

Minecraft:Opaque Minecraft:full blocks (like Minecraft:stone) tend to be conductive while partial blocks (like Minecraft:slabs) or Minecraft:transparent blocks (like Minecraft:glass) tend to be non-conductive. However, there are numerous exceptions (see below).

Many effects of conductivity are non-obvious. Minecraft does not have a single "solid" property for blocks, and for historical reasons, conductivity is sometimes used when a test for solidity is needed.

File:Cut Redstone 1.png

The conductive gold block cuts the redstone dust, preventing it from connecting vertically and does not transmit a signal; the non-conductive tinted glass does not cut the redstone dust, allowing it to connect vertically and transmit a signal

Common properties of conductive blocks:

can be Minecraft:powered
prevent Minecraft:chests from opening when placed on top of them
Minecraft:suffocates Minecraft:mobs inside them
can "cut" Minecraft:redstone dust (prevent redstone dust from connecting vertically, see image)
redstone dust can transmit a signal up or down a conductive block
Minecraft:redstone comparators can measure block state through a conductive block unless its power level is 15.

Other properties may include:

Minecraft:bats can hang upside down on conductive blocks
Minecraft:ghast fireballs start fires on conductive blocks
Minecraft:minecarts "bounce off" conductive blocks if a minecart passes over a powered rail pointing into a conductive block

Common properties of non-conductive blocks:

cannot be powered
do not prevent chest from opening when placed on top of them
do not suffocate mobs inside them
mobs cannot spawn inside conductive blocks. Conductive blocks also play a part in the pack spawning algorithmTemplate:Only.
do not cut redstone dust (prevent from connecting vertically)
redstone dust can only transmit a signal up a non-conductive block, not down Template:Only
redstone comparators cannot measure block state through non-conductive blocks

Other properties may include:

bats cannot hang upside down on them
ghast fireballs do not start fires on them
minecarts stop when passing over a powered rail and colliding with a non-conductive block

Unique conductive blocks

As noted above, most conductive blocks are full solid blocks with the exception of Minecraft:soul sand and Minecraft:mud (7/8 of a block tall).

Minecraft:Mangrove roots, Minecraft:monster spawners Template:Only, Minecraft:trial spawners Template:Only, closed Minecraft:shulker boxes Template:Only, Minecraft:big dripleaf Template:Only and Minecraft:barriers are the only conductive blocks that can be waterlogged.

Minecraft:Target blocks and Minecraft:jukeboxes are unique in that they connect to adjacent redstone dust.Template:Verify

Unique non-conductive blocks

Minecraft:Blocks of redstone, Minecraft:observers, and Minecraft:pistons are full solid blocks made of materials with the solid-blocking property, but are non-conductive.

Non-conductive block placement behavior

Many non-conductive blocks exhibit their own unique behavior regarding what blocks can be placed on them, and what blocks they can be placed on. See Minecraft:Opacity/Placement.

For example, leaves are a full solid non-conductive block, but certain redstone-related blocks cannot be placed on them:

List of conductive blocks

This list contains the basic forms of blocks that share common properties of conductive blocks. All variants of these blocks (e.g. bricks, smooth, polished, cracked, etc.) are also conductive.

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