Mossy Cobblestone Slab — Minecraft block

Overview

In Minecraft 1.21.4, Mossy Cobblestone Slab is a stone-family block. Mossy Cobblestone Slab is made at a crafting table. Hardness 2 puts it in the middle of the pack for mining speed.

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 Mossy Cobblestone. A stonecutter can cut it straight from Mossy Cobblestone, with nothing wasted. Nothing on the crafting grid is made from it.

How long it takes to break

Mossy Cobblestone Slab has a hardness of 2. By hand that is 10 seconds per block; with the correct tool at netherite tier it is 0.35 seconds.

An iron tool takes 0.5 seconds and a diamond one 0.4, so the jump that actually matters for this block is the one to iron.

It will break below wooden, and you will get nothing for it. That combination of time spent and drop lost is the classic mining mistake.

The Efficiency formula is level² + 1 added to tool speed — at V that is about 3.5 times the unenchanted rate.

* breaks the block but yields no drop
Tool	No enchantment	Efficiency III	Efficiency V
Hand *	10 s	10 s	10 s
Wooden	1.5 s	0.25 s	0.15 s
Stone	0.75 s	0.25 s	0.1 s
Iron	0.5 s	0.2 s	0.1 s
Diamond	0.4 s	0.2 s	0.1 s
Netherite	0.35 s	0.2 s	0.1 s
Golden	0.25 s	0.15 s	0.1 s

Properties

With 6 blast resistance Mossy Cobblestone Slab usually goes down to a nearby explosion. It is fully opaque and produces no light. One inventory slot holds 64, the normal full stack. It is renewable, so a single world can supply an unlimited amount of it. A pickaxe is the fastest choice here. A tool of the wrong class is no better than your fist — the speed bonus is tied to the block's own tool tag. As furnace fuel it burns for 7.5 seconds — 0.8 smelting operations.

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