Key takeaways
- Ore is not spread evenly through the world – each type has a depth where it is most common and thins out above and below it.
- Diamond is densest near the very bottom of the world, around Y -59, which is why that number replaced the old Y 11 advice.
- Caves now out-produce strip mining for most ores, because the game generates more ore where there is more exposed stone.
Ask three players where to dig for diamonds and you will get three numbers, at least one of which stopped being true several years ago. Y 11, Y 12, Y -58, Y -59 – all of them have been correct at some point, and the reason they keep changing is that ore generation stopped being a flat lottery and became a set of overlapping distributions with peaks.
Understanding the shape of those distributions is more useful than memorising a depth. Once you know why the numbers are what they are, you can work out where to mine for anything, including the ores nobody writes guides about.
The rule that replaced “dig down to Y 11”
Before the caves and cliffs generation rewrite, most ores used a simple uniform spread: pick a band of Y levels, scatter veins evenly inside it. That is why the old advice was a single number – inside the band, every layer was as good as every other, so you dug to the bottom of the band and tunnelled sideways.
The current system replaced that with distributions that have a peak. Ore is most common at a specific depth and gets progressively rarer as you move away from it in either direction. There is no hard edge any more, just a curve, which is why you still find the occasional diamond at Y 10 and why nobody can quote you a single perfect layer without also quoting a margin.
Triangular distribution, in plain terms
Picture the vertical range an ore can spawn in, and imagine a triangle laid over it. The tip of the triangle sits at the ore’s best depth; the sloping sides run out to the edges of its range. The wider the triangle at a given height, the more ore the game tries to place there. Diamond’s triangle peaks near the bottom of the world, so diamond density climbs steadily as you descend toward bedrock and falls away as you climb back up.
Iron is the clearest demonstration that this is not one triangle per ore. Iron generates in more than one band – a deep one, and a separate one high up in mountains – which is why iron is plentiful both in deep caves and near the surface of a peak, and comparatively thin in between. If you have ever noticed that mountain bases never run short of iron, that is the mechanic doing it.
Why deepslate matters
Below roughly Y 0 the stone turns to deepslate, and every ore in it changes texture. This is cosmetic in terms of what drops, but it is a useful depth gauge: the moment your tunnel turns dark grey, you are in the part of the world where diamond, redstone and lapis are at their densest.
Deepslate is also slower to mine, which is the quiet tax on deep mining. An iron pickaxe chews through stone; in deepslate the same tunnel takes noticeably longer, and this is a real argument for finding a cave rather than cutting your own corridors.
The short version, ore by ore
Coal never generates below Y 0 – if you are deep and out of coal, you are looking in the wrong place entirely, and torches are a better reason to carry spare wood than most players expect. Copper favours the middle of the world and is unusually common in dripstone caves. Gold peaks below sea level, with a large exception: badlands biomes generate extra gold near the surface, which makes them the fastest gold farm in the overworld without touching a piglin.
Redstone and lapis both sit low, close to diamond’s band, which is why a deep mining trip tends to fill your inventory with all three at once. Emerald is the odd one out: it only generates in mountain biomes, as single blocks rather than veins, high up rather than deep. And ancient debris is nether-only, peaking around Y 15, which is why everyone beds their way through the nether at roughly that height.
Caves beat strip mining now
The most practical consequence of the rewrite is that hand-dug tunnels are no longer the efficient option. Ore placement interacts with exposed stone surfaces, and a large cave system exposes enormously more surface than a 2×1 corridor ever will. A single deep cave, lit and walked properly, will out-produce an hour of strip mining at the same depth.
The exception is the ore that hides. Some diamond generates in a pass that deliberately avoids placing it where it would be exposed to air, which is why you can walk a large deepslate cave and see none, then find a vein one block behind the wall. A short branch mine at the bottom of a cave picks up what walking past it misses.
What to do with all this
One thing worth knowing before you go: ancient cities generate in this same depth band. Go down to the deepslate, find a cave, and mine what the cave exposes; take a branch or two off it if you specifically want diamond. Do not dig a staircase from the surface every time – that is twenty minutes of deepslate for nothing. And treat any guide that gives you a single magic Y level, including this one, as shorthand for a curve. The number is the peak, not a rule.