Hey! MasterQaz here!
I have decided to make this blog post about where to find ores in minecraft. I don't know about you guys, but atleast a lot of my friends don't know where to find ores like diamond and emarld.

Here it is:

Emerald: Only found in extreme hills, and between the layers 4 and 31

Diamond: Can be found in all bioms, but only below layer 16

Lapis Lazuli: Between the layers 13 and 16

RedStone: Below layer 16

Gold: Below layer 32

Iron: Below layer 63

Coal: Can be found everywhere (not like floating in the sky, but with other blocks like stone)