Minecraft wiki entry for Mining, associated text: Due to being the safest layers to mine where all ores exist in reasonable quantities (especially diamond), layer 10 to 15 are usually considered the best area in which to start mining. The single best layer for mining is highly debated and is not agreed on. Using the debug screen (F3) (Java Edition exclusive) or coordinates (Bedrock Edition setting) is the easiest way to find the player's altitude. The player can also look for lava pools, all air between Y=-63 and -55 are turned to lava during world generation. (Mining at this layer ensures that the floor remains intact if they pour water). The player can even find and stand on the uppermost layer of bedrock, then climb up 6 blocks. Once they have located their desired layer, they can begin mining using one of the techniques listed below.