Mining is basically the most important thing in Minecraft because if you want to have good tools, weapons, and armor, you need to find ores underground.
Below: recipe for a stone pickaxe
Note: You can make wooden, iron, gold (even though its pretty much useless), diamond, and netherite pickaxes by replacing the cobblestone with wood planks for a wooden pick, iron ingots (iron), gold ingots (gold), diamonds (diamond) or netherite ingots (netherite)
Now, we will teach you some advanced mining techniques and inform you about hazards eventually, and we will even do a block encyclopedia, but first, lets learn about terms of mining and what they mean.
Mining lingo
Cheese cave: a large open cave with lots of exposed ore
Ore vein: a group of the same type of ore
Now, lets explore underground biomes!
Lush Cave
This is a slightly rare biome that is usually found between levels -25 to 30. They are often cheese caves, but can also be a tunnel cave. They contain lots of clay and moss, while being the only biome axolotls spawn in.
Dripstone cave
Dripstone is the main material here, and the spiky stuff in the picture can be used in traps.
Deep Dark
I would stay away from here until you have very good gear and are experienced, because the deep dark often has a structure called an ancient city, which is dangerous because the warden can be found there. The warden is a very powerful boss with 500 health, can sense movement, and can one hit a player in diamond armor.
Blockopedia
Stone
Coal ore
Iron ore
gravel
Diamond ore
Redstone ore
Emerald ore
Lapis Lazuli
Dirt
Diorite
Deepslate
Andesite
Granite
Deepslate Diamond ore
Deepslate Gold Ore
Copper ore
deepslate copper ore
deepslate iron ore
deepslate emerald ore
deepslate redstone ore
Deepslate lapis lazuli ore
Bedrock
Amethyst
sculk
Obsidian
Clay
Tuff
Dripstone block
Obviously, these are just a few of the many, many blocks found underground, but these few were some of the more common and iconic blocks. some of these blocks are very useful, while others are practically useless, and some are in the middle.
Note: useless blocks can be used for building
Stone
iron
diamond
redstone
obsidian
gravel
tuff
andesite
granite
calcite (not listed)
diorite
Amethyst
Dripstone
clay
bedrock
lapis
dirt
copper
Sandstone(not listed)
Mining golden rules
To the left is what will happen if you do this.
There are many more possibilities, but falling into lava is the most iconic.
You can make crafting tables, sticks(for pickaxes) , chests, torches, and many more things!
OK, now you know the golden rules, underground biomes, and even a guide to blocks. Now, here is a guide to methods of mining.
Branch mining can yield many ores if you do it correctly, like the guy in the picture above
To branch mine, find a level you want to mine on, and then make a long one block wide hallway, and make more straight halls on the sides
To make a spiral staircase, build a normal staircase for 3 blocks, turn right, and repeat.
This method of mining is very simple and efficient. First, find a ravine or cheese cave, then look for exposed ores, and just mine them. Simple!
Now, you can't see the staircase or ladder here, but this player has done a good job.
First, make a straight staircase down to bedrock. Now, mine out a 20x20 room (make sure to light it up) and put a chest (double if possible), crafting table, furnace, and bed. Now, use ladders to get back to the surface. This method may be costly, (you need several pickaxes, torches, and LOTS of wood) but if you do several in different areas, you will end up with a lot of stuff.
Note: You can also branch mine off of your SDLU (stair down ladder up) chamber.