How to make a cobblestone generator in Minecraft
A cobblestone generator gives you endless Cobblestone from one Lava Bucket and one Water Bucket.

Lava is the glowing molten rock of the Overworld depths and the Nether's seas.
It gives off light level 15.
It sets fire to players, mobs and nearby wood, gives full light and flows farther and faster in the Nether. Water on a lava source makes obsidian, water on flowing lava makes cobblestone or stone. Collect it with a bucket for fuel or traps.
This item has no crafting recipe.
A cobblestone generator gives you endless Cobblestone from one Lava Bucket and one Water Bucket.
Go to that layer, dig long tunnels instead of exploring caves, and keep a water bucket ready for lava.
An iron farm turns three trapped villagers and one zombie into a steady stream of iron golems, which a lava blade kills over a hopper.
Look for long straight bridges on tall pillars above lava seas, and corridors with windows of Nether Brick Fence.
| level | 0 · 1 · 2 · 3 · 4 · 5 · 6 · 7 · 8 · 9 · 10 · 11 · 12 · 13 · 14 · 15 |
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It is a dangerous fluid for fuel, traps and obsidian.
Yes, light level 15.
No: when a piston pushes it, it breaks and drops as an item.