Tutorials/Cobblestone farming – Official Minecraft Wiki
Piston-Driven Cobblestone Generator (no mining necessary) - Survival Mode - Minecraft: Java Edition - Minecraft Forum - Minecraft Forum
Minecraft EASY Cobblestone Generator Tutorial in 1.16/1.17 - YouTube
1.6.2 Fastest, cheapest and best cobblestone generator! - Redstone Creations - Redstone Discussion and Mechanisms - Minecraft: Java Edition - Minecraft Forum - Minecraft Forum