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	=== Blocks ===		=== Blocks ===
	'''[[File:Emerald Ore JE1.png\|36px]] [[Minecraft:Emerald ore]]'''		'''[[File:Emerald Ore JE1.png\|36px]] [[Minecraft:Emerald ore]]'''
	* Drops 1 [[Minecraft:~~Ruby~~]] when mined.		* Drops 1 [[Minecraft:emerald]] when mined.
	* Generates in blobs of up to 10 blocks.		* Generates in blobs of up to 10 blocks.

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{{Infobox version
|title=Minecraft 12w21a
|image=12w21a Banner.png
|image2=Java Edition 12w21a.png
|edition=java
|type=Snapshot
|parent=1.3.1
|date=May 24, 2012
|clientdl=[https://vault.omniarchive.uk/archive/java/client-release/1.3/pre/12w21a.jar Client] ([https://meta.omniarchive.uk/versions/v1/12w21a.json .json])
|serverdl=[https://vault.omniarchive.uk/archive/java/server-release/1.3/pre/12w21a.jar Server]
|exedl=[https://vault.omniarchive.uk/archive/java/server-release/1.3/pre/12w21a.exe .exe]
[[Category:Versions using legacy download site]]
|prevparent=1.2.5
|prev=12w19a
|next=12w21b
|nextparent=1.3.2
}}<onlyinclude>

'''12w21a''' is the sixth [[Minecraft:snapshot]] for [[Minecraft:Java Edition 1.3.1]], released on May 24, 2012,<ref>{{cite|url=https://web.archive.org/web/20120525103351/https://www.mojang.com/2012/05/minecraft-snapshot-week-21/|title=Minecraft Snapshot Week 21|website=mojang.com}}</ref> which added emeralds, ender chests, and more stairs.

== Additions ==
=== Blocks ===
'''[[File:Emerald Ore JE1.png|36px]] [[Minecraft:Emerald ore]]'''
* Drops 1 [[Minecraft:Ruby]] when mined.
* Generates in blobs of up to 10 blocks.

'''[[File:Ender Chest JE1 BE1.png|36px]] [[Minecraft:Ender chest]]'''
* Crafted with 8 [[Minecraft:obsidian]] and 1 [[Minecraft:eye of ender]].
* All ender chests in a [[Minecraft:world]] have the same contents, if those contents change it affects the contents of all other ender chests.
* On [[Minecraft:multiplayer]], the ender chest's contents are the same for all players on a server.
* Emits light level of 7

'''[[File:Sandstone Stairs JE1.png|36px]] [[Minecraft:Sandstone stairs]]'''
* Have the same function and recipe as other [[Minecraft:stairs]], but made of [[Minecraft:sandstone]].

=== Items ===
'''[[File:Emerald JE1 BE1.png|36px]] [[Minecraft:Emerald]]'''
* Dropped when mining an [[Minecraft:emerald ore]] block.
* Used in villager [[Minecraft:trading]].

'''[[File:Enchanted Golden Apple JE1 BE1.gif|35px]] [[Minecraft:Enchanted golden apple]]'''
* A second type of golden apple made with [[Minecraft:blocks of gold]].
* After being consumed, the player receives 30 seconds of Regeneration IV, plus Resistance and Fire Resistance for 5 minutes.

=== World generation ===
'''[[Minecraft:Desert temple]]s'''
* New generated structure in desert biomes that resemble pyramids.
* Have a [[Minecraft:TNT]] trap and loot chests inside.

'''Desert [[Minecraft:village]]s'''
* Villages that generate in desert biomes now are made of sandstone rather than wood and cobblestone.

=== Gameplay ===
'''[[Minecraft:Trading]]'''
* Villagers buy or sell the player [[Minecraft:emerald]]s in exchange for certain items.
* Trade with villagers by right-clicking on them, opening up a GUI with one buying slot and one selling slot.

=== Command format ===
'''[[Minecraft:Command]]s'''
* {{cmd|seed}}
** Displays the current world seed.

== Changes ==
=== Blocks ===
[[File:Dispenser_(S)_JE2_BE1.png|36px]] '''[[Minecraft:Dispenser]]s'''
* Eject [[Minecraft:water]] and [[Minecraft:lava]] source blocks from buckets.
* Also take water and lava source blocks if there is an empty bucket inside.

[[File:Gravel_JE4_BE3.png|36px]] '''[[Minecraft:Gravel]]'''
* Changed texture from [[File:Gravel_JE3_BE2.png|36px]].

[[File:Placeholder_Block_JE1_BE1.png|36px]] '''[[Minecraft:Locked chest]]'''
* The old [[Minecraft:chest]] textures have been removed; locked chests now [[Minecraft:Java Edition placeholder texture uses#Blocks|use the placeholder block texture]].

=== Items ===
[[File:Bucket_JE1_BE1.png|36px]] '''[[Minecraft:Bucket]]s'''
* Now stackable to 16.

=== Mobs ===
'''[[Minecraft:Passive mobs]]'''
* Can be easily pushed around by simply walking. This eases navigating through animal farms.

=== Non-mob entities ===
[[File:Oak_Boat_JE1.png|36px]] '''[[Minecraft:Boat]]s'''
* Now pass through [[Minecraft:lily pad]]s without breaking the boat; the lily pad drops as an item instead.

[[File:Minecart_JE3_BE1.png|36px]] '''[[Minecraft:Minecart]]s'''
* While sitting inside of a minecart, pushing the directional keys makes it move the direction player is pressing. This only works while the minecart is sitting on rails.

=== Gameplay ===
'''[[Minecraft:Singleplayer]]'''
* The local server no longer runs in a separate Java process, despite still requiring a separate JAR.

'''[[Minecraft:Creative]]'''
* Added [[Minecraft:snow]] to the Creative inventory.

'''[[Minecraft:Sky]]'''
* [[Minecraft:Stars]] are more realistic.
** They are now slightly smaller and slightly brighter.

=== Command format ===
'''[[Minecraft:Command]]s'''
* {{cmd|ban}}
** Added optional <code>reason</code> parameter.
** Ban reasons are displayed when players attempt to rejoin the server after being banned.
** [[Minecraft:Hardcore]] death bans now specify the reason "Death in Hardcore"

=== General ===
'''[[Minecraft:Game Menu]]'''
* The quit button once again properly reads "Save and Quit to Title".

'''[[Minecraft:Options]]'''
* Improved options menu.

'''[[Minecraft:Debug screen]]'''
* The F3 menu no longer has the frame time graph.</onlyinclude>

== Trivia ==
* In this version, when loading a singleplayer world, one needs to put <code>minecraft.zip/server/minecraft_server.jar</code> into <code>.minecraft/server</code> manually to continue loading.

== References ==
{{Reflist}}

== Navigation ==
{{Navbox Java Edition versions|1.0}}

[[Category:Java Edition 1.3.1 development versions]]
[[Category:Java Edition development versions released in 2012]]

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Minecraft:Java Edition 12w21a - Revision history

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