Cobbled Deepslate Slab — Minecraft block

Overview

Cobbled Deepslate Slab is a stone-family block in Minecraft Java Edition 1.21.4. Cobbled Deepslate Slab is made at a crafting table. Expect to wait: its hardness of 3.5 is well above average.

Mine it with a wooden pickaxe or better, or you get no drop at all. Broken correctly, it drops itself. Sixty-four fit in one inventory slot.

The recipe calls for Cobbled Deepslate. A stonecutter can cut it straight from Cobbled Deepslate, with nothing wasted. It goes into exactly one recipe: Chiseled Deepslate.

How long it takes to break

Cobbled Deepslate Slab sits at hardness 3.5: 18 seconds per block with your fists, 0.6 with the correct netherite tool.

An iron tool takes 0.9 seconds and a diamond one 0.7, so the jump that actually matters for this block is the one to iron.

A weaker tool still breaks it, but anything under wooden returns nothing — you spend the time and lose the drop, which is how most veins get wasted.

Efficiency adds its level squared plus one to the tool speed, so Efficiency V is about 4 times faster than the same tool unenchanted.

* breaks the block but yields no drop
Tool	No enchantment	Efficiency III	Efficiency V
Hand *	18 s	18 s	18 s
Wooden	2.7 s	0.45 s	0.2 s
Stone	1.4 s	0.4 s	0.2 s
Iron	0.9 s	0.35 s	0.2 s
Diamond	0.7 s	0.3 s	0.2 s
Netherite	0.6 s	0.3 s	0.15 s
Golden	0.45 s	0.25 s	0.15 s

Properties

Cobbled Deepslate Slab has a blast resistance of 6, so a nearby explosion will usually destroy it. It blocks light completely and emits no light of its own. A single slot takes 64, the usual full stack. A pickaxe is fastest here; any other class mines it at bare-hand speed, because the bonus only applies to the class the block is tagged for. As furnace fuel it burns for 7.5 seconds — 0.8 smelting operations.

Transparent: No
Required tool: Wooden Pickaxe
Fuel value: 7.5 s