Coal - Found everywhere. Very close to the surface veins should be common but small (so it's easy to find your first few coal to make torches or cook, although considering you can just make charcoal it's not necessary). Once you're about 50 metres underground the veins are less common but larger, spawning about the way they do now. This continues down for all depths. Perhaps for expansion coal can be split into three grades:
- Lignite - lowest grade, worth half a normal coal when crafting torches or as furnace fuel. Common at surface level, starts to get less common below 100 metres, rarer below 250 metres, none below 500 metres. Can be mined with wood or better.
- Bituminous - mid grade, equivalent to vanilla coal. Starts appearing at 100 metres, quite common below 250 metres and continues to appear as you go deeper. Starts becoming less common below 1000 metres and stops appearing below 2000 metres. Can be mined with stone or better.
- Anthracite - high grade, 50% more value than normal coal in torch crafting or furnace. Starts appearing at below 1000 metres, where you'll find it occasionally instead of the bituminous coal. Becomes more common until it reaches maximum abundance at 2000 metres. Goes down to infinite depth. Can be mined with iron or better.
Copper - Least expensive metal in the game, replacing iron as the first metal you will craft your tools and armor with. It will also be the only metal you can mine with a stone pick. Uncommon at surface level, but gets more common until you're about 50 metres down. At this point it's a bit more common than vanilla iron is now. Starts to get rarer below 250 metres but you'll still find a decent amount at any depth (but if you need copper you should be close to surface level). A copper tool will mine faster than stone but slower than iron, and have the durability of stone. A copper sword will do the same damage as iron but have the durability of a stone one. Copper armor will have the same protection as leather but the durability of gold.
Iron - Starts appearing about 100 metres down and becomes most common at 250 metres deep. Continues down like this to all depths. You can no longer mine this with stone, but you can with copper. However, when smelted in a furnace being fuelled by specifically
anthracite, you get a steel ingot instead (or through some other method). Steel tools, weapons, and armor are equivalent to vanilla diamond in stats, except steel tools and weapons have half the durability of diamond ones.
Tin - Starts appearing around 200 metres down, but is extremely rare (a bit rarer than diamonds in Vanilla) until you get below 500 metres (where it will start to be about as common as Vanilla gold). Reaches maximum abundance below 1000 metres (about as common as iron), and remains like this for all depths. Can be mined with copper or better. Tin by itself will craft items that are similar to copper but have better durability (still less than iron), and the armor gives protection like gold armor. Crafting together 3 copper + 1 tin will give 2 bronze. Bronze items will perform slightly better than iron.
Silver - Starts appearing around 250 metres down, gradually becomes more common and maxes out at 500 metres. It's a bit more common than vanilla gold at this point. Mine with iron or better. Tools/weapons/armor is like gold but with less enchantability (still more than wood/stone/iron/copper) and tools mine slower than gold ones.
Gold - Starts appearing around 500 metres down, gradually becomes more common and maxes out at 1000 metres, with the same rarity as now.
Platinum - Starts appearing around 1000 metres down, gradually becomes more common and maxes out at 2000 metres, with similar rarity to gold. Mine with iron or better. Items will be like their iron counterparts but with the same enchantability as gold ones.
Diamond - Also starts appearing around 1000 metres down, being extremely rare. Maxes out at a depth of 2500 metres where it's as common as it is now. Items will keep their current stats but get the enchantability of gold (to make them better than steel which will become the more common counterpart).
Redstone - Starts at around 500 metres down, becomes most common at 1000 and below. Some regions will have a lot of it while others will have almost none - you got to keep exploring.
Lapis - Starts at around 250 metres down, becomes most common at 500 metres, then decays and stops appearing below 1000 metres. Again, abundance is regional.
Titanium - Starts at around 2000 metres deep, and is most common below 4000 metres. Even then it will end up being rarer than diamond. Mine with steel/diamond or better. Tools and weapons are superior to their steel counterparts with faster mining and more damage. Armor has the same protection as steel. Everything has 5x more durability than steel.
Tungsten - Starts at around 3000 metres deep, and is most common below 5000 metres. A bit rarer than titanium. Mine with steel/diamond or better. Tools and weapons will only be as good as diamond ones (slower than titanium due to the weight) but will have 4x the durability of the titanium ones. Armor will have the same durability as titanium but offer even better protection.
Remember that these are only an example. One could easily make a progression with different materials or at different depths.
