Emeralds in wrong biome

Thank you for your report!
However, this issue is Working As Intended.

The behavior you have reported is working as intended: Please refer to the 1.18 experimental snapshot and 1.18 changelogs, which are quoted below.

Changes compared to Caves & Cliffs: Part I

New mountain biomes (lofty peaks, snowcapped peaks, grove, meadow, and snowy slopes)

Changes in experimental snapshot 2 compared to snapshot 1

Emeralds and infested stone generate in the new mountain biomes

New ore distribution

Emerald Ore generates above height -16 in mountainous biomes, with more Emerald Ore the higher you go. Emerald Ore below height 0 is very rare!

Please note that mechanics of the game may change between updates.
Things such as graphics, sounds, world creation, biomes, redstone, villagers, and animals may not work the same in current versions.

Full Version History – Snapshot Version History – Feature Requests and Suggestions

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