Ore (feature)



A blob  is a terrain feature consisting of a natural deposit of ores or other blocks in the ground.

Generation
Blobs can generate in caverns or anywhere where there is natural stone. Underground deposits of dirt and gravel are generated in this step, followed by the more precious ores: coal, iron, gold, redstone, diamond, emerald (in mountains biomes) and lapis lazuli. They can form only in stone, andesite, diorite and granite (also in their polished variants, replacing parts of structures), and do not replace each other or any other block. Two or more blobs can form next to each other and appear as a blob made of more than one material.

Upcoming
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This table below based on beta 1.18.0.21

The Nether
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