I am unsure whether this is a bug or not but can't find it mentioned anywhere as a feature, so am reporting it.
While I was mining today I found large deposits of iron ore scattered around a cave I had broken into. Two of these clusters contained a block of raw iron adjacent to iron ore and deepslate iron ore. The block could be mined and smelted after breaking it into its component 9 parts of raw iron.
Screenshots of one of the blocks, both in situ and after mining, are attached.
World seed: 1024 (freshly generated on 1.17.30.24)
Gameplay mode: Survival
Difficulty: Normal
Cheats: All off
Experimental toggles all on except for "Holiday creator features" and "Upcoming modding capabilities".
Linked issues
is duplicated by 8
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Comments 8

Not a bug. Ore veins can include small number of raw ore blocks - this is part of new ore generation added in beta 1.17.30.23.
Not a bug. Ore veins can include small number of raw ore blocks - this is part of new ore generation added in beta 1.17.30.23.
Works as intended.
Sources:
In version 1.17.30.23 added ore vein https://feedback.minecraft.net/hc/en-us/articles/4407848671117-Minecraft-Beta-1-17-30-23-Xbox-One-Windows-10-Android-
Introduces large ore veins to world generation adding more strategy to mining
According to the java version, raw ore blocks are generated in ore vein https://www.minecraft.net/en-us/article/minecraft-snapshot-21w17a
If you are lucky you may find a raw ore block in the vein
Works as intended.
Sources:
In version 1.17.30.23 added ore vein https://feedback.minecraft.net/hc/en-us/articles/4407848671117-Minecraft-Beta-1-17-30-23-Xbox-One-Windows-10-Android-
Introduces large ore veins to world generation adding more strategy to mining
According to the java version, raw ore blocks are generated in ore vein https://www.minecraft.net/en-us/article/minecraft-snapshot-21w17a
If you are lucky you may find a raw ore block in the vein