The new crystal caves in 1.17 spawn not only underground but also in oceans. There are tons (10-20) in a single ocean which makes them less precious and less valuable.
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Comments 2
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We're tracking this issue in MC-203636, so this ticket is being resolved and linked as a duplicate.
That ticket has already been resolved as working as intended, which means this is not considered a bug and won't be fixed. Please do not leave a comment on the linked ticket.
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migrated
Duplicate of MC-203636, which was later resolved as "Works As Intended".