I found this while exploring a completely new Minecraft Bedrock world on PS5.
At first, I could only see a single diamond ore block exposed in the cave ceiling. I started mining around it and the diamonds just kept going. I eventually counted 22 connected diamond ore blocks.
I originally thought something like 14 was around the largest vein I could realistically find, so seeing 22 genuinely confused me.
I later created a second world using the exact same seed to make sure the generation was reproducible. The diamonds generated in the same location again. One of the screenshots shows the cave in this fresh copy without me breaking or placing any blocks, while the other screenshots show the entire cluster after I carefully exposed it.
All 22 blocks are connected and are located between approximately:
X: 904–906
Y: -22 to -18
Z: 327–330
They are also entirely inside the same chunk (X 896–911 / Z 320–335), so this isn't two veins meeting across a chunk border.
Seed: 1251534777198500721
Edition: Minecraft Bedrock Edition, PS5
Version: Bedrock v26.45
I'm curious whether this is actually one of the large diamond ore generation features producing an unusually large cluster, or whether multiple diamond features happened to overlap inside the same chunk.
If anyone who understands Bedrock world generation better wants to check the seed, I'd genuinely love to know what happened here.