There are 2 different types of ore veins , iron ore veins and copper ore veins. An ore vein consists of large, long, streaking collections of ore and a filler rock material. At and above Y=0, ore veins consist of copper ore mixed with granite. Below Y=0, veins consist of iron ore mixed with tuff. They can also contain raw metal blocks. Ore veins can snake and branch out. They can be overwritten by caves, but the player can more easily spot them in the floors, walls, and ceilings of caves.
Ore veins are rare and huge, containing a large quantity of ore blocks. In some cases, more than 2,000 of a particular ore can be found in a single vein.
Technically, ore veins are a part of cave generation and not decorators. As a result, they can generate in The Void biome.
|1.17||March 12, 2021||Agnes Larsson talks about "New really big ore veins we are going to add".|
|21w16a||Added ore veins, which must be enabled using the Caves & Cliffs Prototype Data Pack.|
|April 21, 2021||Henrik Kniberg showcases ore vein generation.|
|April 22, 2021||Kniberg mentions tweaks to ore vein generation: the veins are now more smaller and more clumped.|
|April 22, 2021||Kniberg mentions tweaking generation to make the gaps between clumps smaller.|
|21w17a||Ore veins are now slightly rarer, slightly smaller, more clumpy, and can rarely contain raw metal blocks.|
|21w18a||Ore veins were once again made slightly rarer and slightly smaller on average. Their sizes now vary significantly, meaning players can still find huge ore veins like in previous snapshots as well as smaller ones.|
|Raw metal blocks now generate more frequently within ore veins.|
|1.18||Experimental Snapshot 1||Ore veins can now be found in the base game, and no longer have to be enabled with a data pack.|
|experimental snapshot 2||Ore veins are now slightly larger and spawn more frequently.|
|Caves & Cliffs (experimental)||beta 220.127.116.11||Added ore veins behind the Caves and Cliffs experimental gameplay toggle.|
|beta 18.104.22.168||Ore veins are now slightly larger and spawn more frequently.|
|1.18.0||beta 22.214.171.124||Ore veins can now be found by default, and no longer have to be enabled with experimental gameplay toggle.|