Ore vein

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For the common blobs of ore, see Blob.
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This feature is exclusive to Java Edition. 
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This article describes a feature planned for Bedrock Edition. 
It has not appeared in any development versions yet, but is planned to be included in a future update.
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This page describes an experimental feature. 
This feature is not enabled in-game by default and requires the use of an experimental data pack to be implemented.
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An ore vein is a rare terrain feature that consists of a long streak of ore and rock.

Structure

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.

Generation

Ore veins are rare and huge, containing a very large quantity of ore blocks.[more information needed]

History

Upcoming Java Edition
1.1721w16aAdded ore veins, which must be enabled using an experimental data pack.
April 21, 2021Henrik Kniberg showcases ore vein generation.
April 22, 2021Kniberg mentions tweaks to ore vein generation: the veins are now more smaller and more clumped.
April 22, 2021Kniberg mentions tweaking generation to make the gaps between clumps smaller.
21w17aOre veins are now slightly rarer, slightly smaller, more clumpy, and can rarely contain raw metal blocks.
21w18aOre 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. Additionally, raw metal blocks now generate more frequently within ore veins.