I was mining in my 1.18.2 Hardcore world and I came by 16 deepslate diamond ore in a single chunk and it is all connected. I was wondering if anyone knew the chances of this happening because I always thought the max size was 8 for a vein in one chunk and as you can see here I have chunk borders enabled.
This is perfectly normal in 1.18, where a single vein of up to 23 diamond ore can generate in 1/9 of chunks, and otherwise there are up to 53 ore in a single chunk (6 * 5 + 23), averaging around 20 based on the max vein size and average actually placed per chunk in older versions (about 3.7 ore per chunk out of a max of 10*) so compared to previous versions it is very common to find veins of 16 or larger, if still relatively uncommon (I've seen many reports of similar finds here and on Reddit):
In Java Edition, Diamond ore can generate in the Overworld in the form of blobs. Diamond ore attempts to generate in two batches. The first batch generates 6 times per chunk in blobs of 0-5 ores, from Y=14 to Y=-63, being more common as the y-level decreases. The second batch generates in 1/9 of chunks in blobs of 0-23 ores, from Y=14 to Y=-63, being more common as the y-level decreases.
Notably, this also mean it is theoretically possible to find contiguous veins spanning multiple chunks, not just at the borders of up to 4 chunks, even infinite if "repeating" seeds still exist (the RNG was changed in 1.18).
*The maximum number of ore in a single chunk before 1.18 was 10, not 8, as so widely claimed and easily disproved (a vein like that shown can only be a single vein, if it is more than 2x2 in size it will be two or more separate veins, which would also apply to the smaller veins in 1.18, with the bigger veins being up to about 5 blocks long, similar to coal veins):
I was mining in my 1.18.2 Hardcore world and I came by 16 deepslate diamond ore in a single chunk and it is all connected. I was wondering if anyone knew the chances of this happening because I always thought the max size was 8 for a vein in one chunk and as you can see here I have chunk borders enabled.
It is possible that two veins with a size of 8 ores each generated right next to each other, that is just my theory though!
This is perfectly normal in 1.18, where a single vein of up to 23 diamond ore can generate in 1/9 of chunks, and otherwise there are up to 53 ore in a single chunk (6 * 5 + 23), averaging around 20 based on the max vein size and average actually placed per chunk in older versions (about 3.7 ore per chunk out of a max of 10*) so compared to previous versions it is very common to find veins of 16 or larger, if still relatively uncommon (I've seen many reports of similar finds here and on Reddit):
Notably, this also mean it is theoretically possible to find contiguous veins spanning multiple chunks, not just at the borders of up to 4 chunks, even infinite if "repeating" seeds still exist (the RNG was changed in 1.18).
*The maximum number of ore in a single chunk before 1.18 was 10, not 8, as so widely claimed and easily disproved (a vein like that shown can only be a single vein, if it is more than 2x2 in size it will be two or more separate veins, which would also apply to the smaller veins in 1.18, with the bigger veins being up to about 5 blocks long, similar to coal veins):
https://minecraft.fandom.com/wiki/Talk:Diamond_Ore#Natural_generation (a lot of discussion of what the max size actually is, which was indeed found to be 10 based on actual simulations and measurements. I assume a similar thing was done to find the sizes of ores in 1.18)
TheMasterCaver's First World - possibly the most caved-out world in Minecraft history - includes world download.
TheMasterCaver's World - my own version of Minecraft largely based on my views of how the game should have evolved since 1.6.4.
Why do I still play in 1.6.4?