Minecraft Cobblestone Farm 1.20+ - Java edition 

This video is a tutorial to make automatic cobblestone farm which produces over 21,000 cobblestone per hour. It is really easy to make and highly efficient. Watch till the end
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World download for this farm: www.patreon.com/dwen_1/shop/automatic-cobblestone-farm-1-20-world-416563
Material List:
Cobblestone - 24
Water Bucket - 2
Oak leaves - 32
Lava Bucket - 24
Scaffolding - 12
Chest - 12
Repeater - 9
Redstone dust - 8
Slab - 7
Hopper - 6
Observer - 5
Note block - 2
Piston - 2
Lever - 1
Trapdoor - 1
Obsidian - 1
Redstone Torch - 1
Tnt - 1