How to get it
Crafting
Crafting, any arrangement (fits the 2×2 grid)✓ Emma made it in-game
Breaking blocks
| Block | How | Drops | Chance |
|---|---|---|---|
| Polished Blackstone Button | by hand, faster with a pickaxe | 1 | 100% |
From scratch
The cheapest way to make one, worked out from every recipe the way Emma's planner breaks a goal down.
Gather
Blackstone×4break Blackstone (any pickaxe)