Double slab: No
Yes (64), same type only
Single Slab: Itself
Slabs are half-blocks. Upside-down slabs occupy the top half of their block space rather than the bottom half. To place a slab upside-down, right-click on the bottom of a "ceiling" block, which can be removed after the slab has been placed, or by right clicking the top half of another block, if the player wishes to place it on the side of another double or single slab block.
All types of "stone" slab have the same data values; like wood and colored wool, they are differentiated by their damage values: stone slabs have a damage value of 0, sandstone slabs has 1, old wooden slabs has 2 (which were actually stone, and are still obtainable), cobblestone slabs has 3, bricks has 4, stone bricks has 5, and nether bricks has 6. Damage value 7 is occupied by nether quartz, and formerly by a smooth variant of the stone slab. Upside down stone slabs have a damage value of 8, sandstone has 9, wooden has 10, cobblestone has 11, bricks has 12, stone bricks has 13, nether bricks has 14, and nether quartz has 15. Real wood slabs use a different set of block and damage values.
 Natural Occurrence
Stone slabs can be found naturally in NPC Villages lining the roof of a blacksmith shop and inside some of the buildings where they form counters. They are also found in Strongholds where they are used in some of the stairs, ledges and torch pillars. Sandstone slabs can be found naturally in desert wells and desert temples.
Unlike many wooden items, wooden slabs must be crafted entirely from one type of wood, but by the same token, they keep the type (and color) of the wood used, thus "Birch Wood Slabs" and so forth.
Any Stone Bricks
Any Wood Slab
Any Wood Planks
Any Quartz Block
 As a crafting ingredient
Like other partial blocks, slabs are treated as a whole block by other blocks, such as dirt, stone, and glass, and liquids. Two slabs of the same type (e.g. two stone slabs) can be placed one on top of one another to make a single full-size block, but different slab types cannot be mixed in this way. Sandstone, wooden, and cobblestone double-slabs look exactly the same as their full block counterparts, but take a longer time to break and drop two slabs. Wooden slabs are collected more quickly with an axe and are flammable.
Single slabs have the tendency to let through arrows shot from above. They will also destroy gravel and sand blocks that fall onto them (the same as torches, as long as the slab is a bottom-half). They are also treated as transparent by the game and can cause suffocation, prevent placement of torches or other fixtures on them and chests with single slabs above them can still be opened.
An unusual property of slabs is that they are non-solid to redstone. This allows redstone wiring to be hidden underneath while still being able to connect to the wire on the side of the slabs. In addition, redstone placed on top of an upside-down slab can receive signals from an adjacent block of redstone one block lower but cannot transmit signals to it. This is why "ladders" made from upside-down slabs, as pictured to the right, can transmit redstone signals up, but not down.
Mobs can spawn on top of upside down slabs and on double slabs.
Due to the way blast rays propagate from an explosion, slabs provide extremely effective absorption to explosions directly on top of them. Specifically, this is because explosive entities will be lower in elevation when they explode on top of slabs than they would otherwise be on an ordinary block. Although the few slab(s) directly under the explosion will absorb the full force of the blast (with a resistance of 30) as usual, the propagation of damage to the sides will be greatly reduced. If source of the explosion is elevated for any reason at the time of the blast, this protective quirk is lost.
Despite how sneaking lowers the player's eye level half a block, doing so does not allow the player to walk over a single slab with one block of air above it because of the player's true height. A player cannot walk from a block of soul sand to a slab without jumping.
 Data Values
Double Stone Slabs, Block ID: 43, Name: minecraft:double_stone_slab. The Full Stone and Sandstone Slabs have a top texture on all sides.
|0||0||0||Double Stone Slab|
|1||1||1||Double Sandstone Slab|
|2||2||10||Double (Stone) Wooden Slab|
|3||3||11||Double Cobblestone Slab|
|4||4||100||Double Bricks Slab|
|5||5||101||Double Stone Brick Slab|
|6||6||110||Double Nether Brick Slab|
|7||7||111||Double Quartz Slab|
|8||8||1000||Full Stone Slab|
|9||9||1001||Full Sandstone Slab|
Single Stone Slabs, Block ID: 44, Name: minecraft:stone_slab.
|2||2||10||(Stone) Wooden Slab|
|5||5||101||Stone Brick Slab|
|6||6||110||Nether Brick Slab|
|8||8||1000||Upside-Down Stone Slab|
|9||9||1001||Upside-Down Sandstone Slab|
|10||A||1010||Upside-Down (Stone) Wooden Slab|
|11||B||1011||Upside-Down Cobblestone Slab|
|12||C||1100||Upside-Down Bricks Slab|
|13||D||1101||Upside-Down Stone Brick Slab|
|14||E||1110||Upside-Down Nether Brick Slab|
|15||F||1111||Upside-Down Quartz Slab|
Double Wooden Slabs, Block ID: 125, Name: minecraft:double_wooden_slab.
|0||0||0||Double Oak Wood Slab|
|1||1||1||Double Spruce Wood Slab|
|2||2||10||Double Birch Wood Slab|
|3||3||11||Double Jungle Wood Slab|
|4||4||100||Double Acacia Wood Slab|
|5||5||101||Double Dark Oak Wood Slab|
Single Wooden Slabs, Block ID: 126, Name: minecraft:wooden_slab. Data values 5 and 6 are placeholders because there are 2 less types of wooden slabs than there are types of stone slabs.
|0||0||0||Oak Wood Slab|
|1||1||1||Spruce Wood Slab|
|2||2||10||Birch Wood Slab|
|3||3||11||Jungle Wood Slab|
|4||4||100||Acacia Wood Slab|
|5||5||101||Dark Oak Wood Slab|
|8||8||1000||Upside-Down Oak Wood Slab|
|9||9||1001||Upside-Down Spruce Wood Slab|
|10||A||1010||Upside-Down Birch Wood Slab|
|11||B||1011||Upside-Down Jungle Wood Slab|
|12||C||1100||Upside-Down Acacia Wood Slab|
|13||D||1101||Upside-Down Dark Oak Wood Slab|
|October 24, 2009||Stone slabs were introduced to the game on October 24, 2009, in Classic Survival Test 0.27.|
|In Classic and Survival Test, stone slabs could be obtained by mining Coal Ore because of the lack of inventory and crafting.|
|Stone slab blocks were called stair blocks before the current stairs were added; after this, they were known as steps (the two forms being single steps and double steps) before all items got official names upon the Beta release.|
|1.3||Added sandstone, wooden, and cobblestone slabs.|
|Before the additional slabs were added, a double stone slab would only yield one slab when broken. Since this update, all double slabs yield 2 of their respective single slabs when broken. Destroying double slabs with TNT, however, still only yields single slabs (when the slabs aren't simply destroyed by the explosion).|
|Before Beta 1.3 came out, stone slabs were made with cobblestone instead of stone, but this update introduced cobblestone slabs to the game and changed the recipes for pressure plates and stone slabs so that there wouldn't be any conflicting recipes.|
|1.8||Added the stone brick, bricks, and smooth full half-slab. (Smooth full half-slab was only obtainable through inventory editing at the time.)|
|The sprinting feature was added in this update. While stairs stop the player's sprinting, slabs allow a player to continue sprinting.|
|1.2 Preview||All types of slabs can now be placed upside down and under blocks; these occupy the top half of their block space rather than the bottom half.|
|Before 1.2, slabs had a 2:1 input/output ratio, i.e. 3 cobblestone would get you only 3 slabs out of the current 6. This is likely due to the fact that the slab types are differentiated by their damage values instead of by different data values, similar to wood, coal or charcoal, and colored wool.|
New slabs were added for the four different types of wooden planks, replacing the old wooden oak/"stone" slab. The new slabs were vulnerable to fire, but could now be collected faster with an axe instead of a pickaxe. The old wooden slabs did not burn and could only be collected with a pickaxe because they were the same block and shared the same data value as other slabs, except with a different texture. This caused wooden slabs to break faster with a pickaxe rather than an axe. Wooden slabs were also are not affected by fire and had a stronger blast resistance than wooden planks, which made them a useful building material. These properties could be used in SMP to help prevent griefing, and the fact that wooden slabs didn't burn also made it useful for creating houses in The Nether; but since the update, they can no longer be safely used. The original wooden oak/"stone" slab can still be obtained through inventory editing or the /give command. Wooden slabs already crafted or placed in the world remain the old 'stone' type.
|All four wooden upside-down slabs had the oak plank texture.|
|12w18a||Fixed upside down slabs having same texture.|
|12w25a||Redstone (including repeaters, torches, levers, and pressure plates) and rails can now be placed on slabs and stairs positioned upside down.|
|12w26a||Mobs can now spawn on upside down slabs.|
|Smooth lighting on slabs is slightly bugged.|
|November 28, 2012||Jeb tweeted a picture of himself crafting netherbrick slabs.|
|1.4.6||12w49a||Added nether brick slabs, which causes the smooth full half-slab to change its damage value to 43:7|
|1.5||13w02a||Added quartz slabs. The formerly unused slab type, known as the smooth full half-slab (see gallery), was removed from the game. Its data values were replaced with the nether quartz slab.|
|January 22, 2013||Jeb states that the smooth full half-slab will be re-implemented with a value of 43:8. The smooth sandstone slab will also be implemented, with a value of 43:9. He also stated that they may be obtained legitimately later.|
|1.5||13w04a||The smooth full half-slab is re-implemented with a value of 43:8. The smooth sandstone full half-slab is also added, with a value of 43:9.|
|1.7.2||1.7pre||Added acacia and dark oak slabs.|
|1.8||14w02a||Stone Brick slabs can now be used to craft Chiseled Stone Bricks also you can craft stone slabs using the new Polished Granite, Polished Diorite or Polished Andesite|
|Pocket Edition Alpha|
|0.1.0||Added stone slabs.|
|0.3.0||Added wooden (original oak) and brick and cobblestone slabs.|
|0.6.0||Added sandstone and stone brick slabs.|
|Slabs can be placed on the top half of blocks.|
|The recipes for crafting slabs gives 6 slabs instead of 3 slabs.|
|0.8.0||Added birch and spruce wooden slabs.|
|TU1||Added stone, wooden (original oak), sandstone and cobblestone slabs.|
|TU5||Added stone brick and brick slabs.|
|0.1.1||Added stone, wooden (original oak), brick and cobblestone slabs.|
 Dirt slab
Before stone slabs were added to 0.26, Notch ran a test of dirt slabs. They were never added to the actual game and were only mentioned once. They replaced all dirt blocks and did not grow grass on top.
Issues relating to "Slabs" are maintained on the issue tracker. Report issues there.
- An unused slab type, known as the "smooth full half-slab", has a data value of 438, but can only be obtained with
/giveor an inventory editor. It is a full block with the top texture of stone slabs on all six sides. A similar effect with sandstone can be obtained with 439. See the gallery for a comparison image.
- Slabs let a small amount of light pass through their edges. This light is only visible with Smooth Lighting turned on, and does not affect mob spawning or other light-dependent processes.
- The exception of this is that any light directed through a slab does not affect any block's light values north of the source.
- When a slab is placed on top of ice, the slab has the same "slipperiness" as the ice below it. This applies to every other block with a hit-box less than a full block.
- If slabs are placed below TNT, it will significantly reduce their damage. By making a floor of slabs, the TNT will lower its explosive power to two blocks instead of six. This is so because the TNT believes that it is inside the slab, for the game thinks that it is inside a full block, greatly reducing its explosion radius.
- mobs see a slab as a full block. Therefore, by placing an upside down slab above a slab with a block in between, there will be sufficient space for the player to walk through. Mobs, however, will see one block of space in between and won't get through. This does not apply to baby zombies and spiders, because they are only one block tall, and to slimes, as they will hop towards the player even if there is something obstructing the way.
- Stone slabs are the only slab which, when stacked, do not mimic their block in texture.
- You can sneak walk off slabs at ground level.
- Minecarts on powered rails will not be repelled from a slab. They will, however, be repelled by a slab with a minecart on top.
- Though wooden slabs are flammable, the old wooden oak/"stone" slab is still available through inventory editing or the /give command, so in a world/server where commands are allowed, it is possible to obtain fireproof wooden slabs.
- When Creepers explode on stone slabs they only destroy the slab they were standing on and nothing else in the area.
- It is possible to get any type of double slab that you want by using the /give command and typing in /give (player) stone_slab 1 (slab id). This will allow you to build faster. There is not however any way to get a double slab in your inventory without commands, creative mode or mods.
- If you type in /give <player> stone_slab 1 10, then it will give you a wooden slab or plank, but it acts like a stone block. It is not flammable and it makes "stone" sound effects when they are placed, broken, or stepped on. This is the version of the wood slab that was used for old slabs when wood slabs were made flammable.
- If redstone dust is placed on an upside-down slab, it will not trigger adjacent TNT.
- If you set a slab on the top half side of any block under water, it will displace as much of it as a whole block. Not only can you grab a quick breath of air, but you can see as clear through the water as looking over the land above the surface than in it itself.
- When an upside down slab is pushed from the bottom by a piston (or regular slab pushed from the top), it is pushed without having contact from the piston. The same idea can also be made when pulled by a sticky piston.
Trap doors on slabs.