Java Edition 1.17

1.17, the first release of the Caves & Cliffs update, is a major update to with no set release date so far. It was first announced during Minecraft Live 2020 on October 3, 2020.

Blocks
Amethyst Geode


 * make bell-like sounds
 * rare
 * grow from another, unobtainable block
 * drop crystal shards, which can be crafted into a Telescope

Copper


 * turns green over time, like real copper


 * Copper Ore
 * Copper Block
 * Copper Stair
 * Copper Slab

Glow berries


 * light source

Spore blossom

Dripleaf

Sculk block


 * Sculk sensor
 * Can be used for wireless redstone


 * Stalactites and stalagmites


 * Stalactites can drip water to fill cauldrons


 * Stalagmites can deal damage


 * Powdered Snow

Items
Telescope

Mobs
Warden


 * This mob appears deep underground and will attack the player when they sense movement.
 * Blind but follows sources of noise such as snowballs hitting blocks.
 * It is incredibly strong and is able to kill you very easily even if wearing netherite armor.
 * It is blind and won’t attack you straight away.

Goat


 * Spawn in mountainous biomes.
 * Part of Minecon Live 2019's mountain features.
 * Can jump very high into the air to avoid obstacles.
 * Attacks some animals and knocks them very far away.

Glow Squid


 * Glows underwater

World generation
Lush caves


 * Generate below Azalea trees.
 * contain glow berries.

Dripstone caves


 * Contain stalactites and stalagmites


 * Improved general cave generation