Block entities item form can hold custom NBT tags that are merged to the specified block entity when they're placed.
    Example: /give @p command_block 1 0 {BlockEntityTag:{Command:"/setblock ~ ~ ~ minecraft:diamond_block"}}
    Gives a command block that, when placed, will automatically have the command /setblock ~ ~ ~ minecraft:diamond_block set.

    Contains the item data of the item currently held in the player's hand.
    Added to compact the process of testing if a player is holding a specific item.
        Previous method required nine commands (one per slot in the hotbar); now requires only one command.

Instances of blocks/items references in commands, can now be named ids
    Example: id:"minecraft:stone".
    In scoreboards, the format is minecraft.block.stone.
    Old numerical ids are still supported, but will eventually be phased out.
    This is part of the requirements for the Plugin API.

Now uses block states internally instead of metadata.
Metadata will still be used for a while.
Metadata no longer needs to be calculated out of the 4-bit data value; instead, the values of specified properties can now be easily gotten and set.
    Example: .minecraft/saves/TheMapWithTheThing/resources.zip.

1   1   minecraft:stone     Stone S B
3   3   minecraft:dirt  Dirt S B
19  13  minecraft:sponge    Sponge S B
23  17  minecraft:dispenser     Dispenser S E
48  30  minecraft:mossy_cobblestone     Moss Stone
64  40  minecraft:wooden_door   Oak Door I S
67  43  minecraft:stone_stairs  Cobblestone Stairs S
77  4D  minecraft:stone_button  Stone Button S
85  55  minecraft:fence     Fence
98  62  minecraft:stonebrick    Stone Bricks S B
107     6B  minecraft:fence_gate    Fence Gate S
137     89  minecraft:command_block     Command Block E
138     8A  minecraft:beacon    Beacon E
143     8F  minecraft:wooden_button     Wooden Button S
144     90  minecraft:skull     Mob head I S E
151     97  minecraft:daylight_detector     Daylight Sensor E
157     9D  minecraft:activator_rail    Activator Rail S
167     A7  minecraft:iron_trapdoor     Iron Trapdoor S
170     AA  minecraft:hay_block     Hay Bale S
174     AE  minecraft:packed_ice    Packed Ice

DV  Description
0   Stone
1   Granite
2   Polished Granite
3   Diorite
4   Polished Diorite
5   Andesite
6   Polished Andesite

DV  Description
0   Dirt
1   Coarse Dirt
2   Podzol

Replaces the grassless dirt variant found in mega taiga, mesa and savanna biomes.
    All worlds with grassless dirt blocks will seamlessly change over to coarse dirt, as it uses the same block ID and data value as the original grassless dirt block.
Slightly darker texture than regular dirt.
Can be picked up with bare hands (silk touch is not required).
Tilling coarse dirt with a hoe will turn it to regular dirt.
Crafting recipe: dirt and gravel in a 2×2 checkered pattern yields four coarse dirt.

DV  Description
0   Sponge
1   Wet Sponge

Reintroduced sponge to survival mode, with new behavior and texture.
Sponge turns into wet sponge when it soaks up water.
    Water particles appear around the sponge when this happens.
Sponge destroys water blocks from 5 blocks away in a kind of sphere.
Sponge soaks up water, only when some water is touching it.

Obtained when a sponge soaks up water.
Smelting a wet sponge yields a dry sponge.
    When smelted, they will fill empty buckets in the fuel slot with water if possible.
Emits water dripping particles while placed.
Dropped by elder guardians on player kills.

Can place pumpkins or wither skeleton skulls to spawn golems and withers respectively.
    Will only place them if the body of the golem or wither is already built, in a valid configuration.
Can place command blocks with pre-configured commands.

Now craftable from one cobblestone and one vine.

Stack to 64.
The crafting recipe for doors gives three doors instead of one.
Door item textures were given more detail, to be consistent with the item textures of the new doors.
    The above changes apply to both oak doors and iron doors.
"Wooden Doors" have been renamed to "Oak Doors".
    This was made in order to accommodate for the new door variants.

"Stone Stairs" were renamed to "Cobblestone Stairs" to avoid ambiguity.

Can be placed on the ceiling and on the ground.

Survival players cannot longer look inside the command block to see the command.
Show the @e target selector description, along with the rest in the UI.
Added an X/O button next to "last output" in the command block UI, to toggle the visibility of the last output string.

Beacon light beams change color when going through stained glass and stained glass panes.
    Making it feed into multiple stained glass blocks/panes will combine the colors.
Beam now goes through all blocks that don't completely block light: Ice, water and leaves.

Can be placed on the ceiling and on the ground.

Made creeper, skeleton and zombie heads available in survival.
    Creepers, skeletons, wither skeletons and zombies drop their heads when killed by charged creepers. Wither skeletons continue to have heads as rare drops.
    Charged creeper explosions will not yield more than one mob head, regardless of how many mobs were killed by it.
Skulls worn on heads are bigger, so the 2nd skin layer doesn't render outside.
Player heads now have a 3D item model.
Player/mob heads, both in inventories and held by mobs/players, now display the actual head skin/texture-including the second skin layer of player skins.
    Placed player heads also render the 2nd skin layer.

Can be inverted with a right click, which changes the color of the nine "sensors" to change to a blue hue.
    Reaches full strength at the opposite time than it would when set to normal.
    This can allow for a light that turns on at night rather than day, without the need of a NOT gate.

Powered activator rails will shake minecarts, causing riders (players or mobs) to dismount.

Rebalanced how they heal and accelerate the growth of horses.
    Now do it nine times as fast.

Mined faster with a pickaxe.

"Fences" and "Fence Gates" have been renamed to "Oak Fences" and "Oak Fence Gates" respectively.
"Trapdoors" were renamed to "Wooden Trapdoors"
    The above changes were made to facilitate the distinction, with the new variants for each block.

New types of fences, fence gates and doors, for all the different types of wood.
Different types of fences and fence gates can connect to each other (except nether brick fences as usual).
Every recipe requires all wood planks to be of the same type.
    New crafting recipe for fences: 2 sticks and 4 planks to make 3 fences.
Different types of doors have different models, with some types having no windows.

165     A5  minecraft:slime     Slime Block
166     A6  minecraft:barrier   Barrier

168     A8  minecraft:prismarine    Prismarine S B
169     A9  minecraft:sea_lantern   Sea Lantern
170     AA  minecraft:hay_block     Hay Bale S
171     AB  minecraft:carpet    Carpet S B

173     AD  minecraft:coal_block    Block of Coal

176     B0  minecraft:standing_banner   Standing Banner I S E
177     B1  minecraft:wall_banner   Wall Banner I S E
178     B2  minecraft:daylight_detector_inverted    Inverted Daylight Sensor E
179     B3  minecraft:red_sandstone     Red Sandstone S B
180     B4  minecraft:red_sandstone_stairs  Red Sandstone Stairs S
181     B5  minecraft:double_stone_slab2    Double Red Sandstone Slab S
182     B6  minecraft:stone_slab2   Red Sandstone Slab S
183     B7  minecraft:spruce_fence_gate     Spruce Fence Gate
184     B8  minecraft:birch_fence_gate  Birch Fence Gate
185     B9  minecraft:jungle_fence_gate     Jungle Fence Gate
186     BA  minecraft:dark_oak_fence_gate   Dark Oak Fence Gate
187     BB  minecraft:acacia_fence_gate     Acacia Fence Gate
188     BC  minecraft:spruce_fence  Spruce Fence
189     BD  minecraft:birch_fence   Birch Fence
190     BE  minecraft:jungle_fence  Jungle Fence
191     BF  minecraft:dark_oak_fence    Dark Oak Fence
192     C0  minecraft:acacia_fence  Acacia Fence
193     C1  minecraft:spruce_door   Spruce Door I S
194     C2  minecraft:birch_door    Birch Door I S
195     C3  minecraft:jungle_door   Jungle Door I S
196     C4  minecraft:acacia_door   Acacia Door I S
197     C5  minecraft:dark_oak_door     Dark Oak Door I S

Crafting recipe: 9 slime balls.
    Can be crafted back into 9 slime balls.
Players and mobs that land on their top side will bounce, like on a trampoline.
    This negates all fall damage.
        Holding ⇧ Shift will negate the rebound while still negating the fall damage.
    Bounce rebound velocity is scaled by impact velocity.
        Height can reach up to 60% of initial height, which implies a great restitution coefficient.
    Does not affect falling item entities.
Walking on it is slower than walking on soul sand and close to one's speed while sneaking.
The placing/breaking sounds use the hurt sounds of slimes.
Can be mined with only one click, without any tools in survival.
Slime blocks will push and pull each other, along with adjacent blocks, when at least one of them is moved by a sticky piston.
    Normal pistons will have the same effect, except that they fail to pull even a single slime block.
    Coded by KaboPC and Panda4994.[3][4]
        Follow all the existing rules that pistons followed:
            A chain of slime blocks and its adjacent blocks connected to a piston, in any arrangement, can be moved as long as the following conditions are met:
                The piston is not moving more than twelve blocks at a time.
                Non-movable blocks are not obstructing the path.
                Not a single slime block in the chain is attached to the piston itself.
    Allows for moveable contraptions.
Extending a piston with a slime block attached will propel adjacent entities (mobs, players, items, launched arrows, etc.) in the appropriate direction.[5]

Acts like bedrock, but is completely transparent.
    Can transfer redstone signals and allows blocks to be placed on it.
    Can only be destroyed and obtained in Creative mode.
    It gives the same particles as lava does when destroyed.
Becomes visible to players who are holding a barrier in their hand, while in creative.
    Appears to be rendered as specially big particles, in the form of a red and square cross-out symbol.
        There is exactly one particle inside of every block.
        The face always follows the player.
        That texture is also used for its item form.
        The particles are only rendered for the blocks in the vicinity of the player.

Can only be opened and closed using redstone, similar to an iron door.
Crafting recipe: iron ingots in a 2×2 pattern yields one iron trap door.

DV  Description
0   Prismarine
1   Prismarine Bricks
2   Dark Prismarine

Generate in ocean monuments.
Can be crafted with prismarine shards and prismarine crystals.
Emit light at a light level of 15 and have a subtle animated texture.

Name    Value   Description
 axis   x   The ends of the hay block point east-west.
 axis   y   The ends of the hay block point up-down.
 axis   z   The ends of the hay block point north-south.

0: south
1: south-southwest
2: southwest
3: west-southwest
4: west
5: west-northwest
6: northwest
7: north-northwest
8: north
9: north-northeast
10: northeast
11: east-northeast
12: east
13: east-southeast
14: southeast
15: south-southeast

2: north
3: south
4: west
5: east

Crafted like signs, but with one color of wool instead of planks.
Can be stacked to 16.
Most patterns are created by arranging dyes in certain ways around a banner on a crafting table (see the page on banners for a full list).
    Other patterns are achieved with specific items.
        Item – pattern: "creeper skull – creeper face", "wither skeleton skull – skull and crossbones", "brick block – brick texture background", "oxeye daisy – flower icon", "vines – curly border" and "enchanted golden apple – Mojang logo.
        Making these patterns without dyes will result in a black color by default
Banners can have up to six layers (in survival).
    Over a quadrillion possible combinations, counting rotations and visually identical patterns due to occlusion.
    The layers show in the order they were created.
    Custom banners with more than six layers are possible using commands.
Top-most layer can be removed using cauldrons.
    This removes a third of the water of a full cauldron.
    All layers can be removed.
Can be placed on walls or on the ground.
They are visually like an entity that is one block wide and two blocks tall, but in reality they are a block occupying the lower portion, but having a bigger model.
    The hitbox is smaller than a full block, and it lacks any collision properties.
    On the ground they have 16 different possible rotations (like an armor stand).
    Has an animation when placed on the ground, that simulates swaying with the wind.
Can be worn as head gear, but only using the /replaceitem command.
Can be cloned by crafting them together, with a blank banner of the corresponding base color.
Can be used as fuel in furnaces.

DV  Description
0   Red Sandstone
1   Chiseled Red Sandstone
2   Smooth Red Sandstone

Can be crafted with 4 red sand in a square.
Can be crafted into chiseled, smooth, stair and slab forms.
    Chiseled variant has a wither pattern to complement the creeper pattern found in chiseled sandstone.
    Slabs have a smooth variant, similar to stone and sandstone.
    Comes as a smooth double slab – minecraft:double_stone_slab2:8.
Generated only in Mesa biomes at cave entrances.

DV  Description
0   Double Red Sandstone Slab
8   Smooth Double Red Sandstone Slab

0: Slab is right-side-up, occupying the bottom half of its voxel.
1: Slab is upside-down, occupying the top half of its voxel